21391

Number 21391 is an odd five-digits prime number and natural number following 21390 and preceding 21392.

Properties of the number 21391

Nominal	21391
Cardinal	twenty-one thousand three hundred ninety-one
Cardinal twenty-one thousand three hundred ninety-one
Ordinal	21,391st
Number of digits	5
Sum of digits	16
Product of digits	54
Number parity	Odd

Previous number is 21390

Next number is 21392

Calculation was done in 0.0000369549 seconds

Prime Factorization of 21391

Prime factorization	21391
Prime factors	21391
Number of distinct prime factors ω(n)	1
Total number of prime factors Ω(n)	1
Sum of prime factors	21391
Product of prime factors	21391

Calculation was done in 0.0011608601 seconds

Divisors of 21391

List of proper divisors	1
List of all dividers	1, 21391
Number of divisors d(n)	2
Sum of all divisors σ(n)	21392
Aliquot sum	1
21391 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 21390.

Calculation was done in 0.0000200272 seconds

Prime numbers

Is 21391 a prime number?	Yes
Is 21391 a semiprime number?	No
Is 21391 a Chen prime number?	No
Is 21391 a Mersenne prime number?	No

Previous prime is 21383

Next prime is 21397

Calculation was done in 0.0907380581 seconds

Sequences

Is 21391 a Catalan number?	No
Is 21391 a Fibonacci number?	No
Is 21391 a Idoneal number?	No

Calculation was done in 0.0000059605 seconds

Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.

21391 is not a Happy number

21391 is not a Humble number

21391 is not a Münchhausen number

21391 is not a Perfect number

21391 is not a Perfect square

21391 is not a Palindrome

Calculation was done in 0.0069031715 seconds

Numeric Bases of 21391

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.

Base	System	Value
2	Binary	101001110001111₂
3	Ternary	1002100021₃
4	Quaternary	11032033₄
5	Quinary	1141031₅
6	Senary	243011₆
7	Septenary	116236₇
8	Octal	51617₈
9	Nonary	32307₉
10	Decimal	21391
12	Duodecimal	10467₁₂
16	Hexadecimal	538f₁₆
20	Vigesimal	2d9b₂₀
36	Base36	gi7₃₆
60	Sexagesimal	5uV₆₀

Calculation was done in 0.0000200272 seconds

Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.

Square of 21391 (n²)	457574881
Cube of 21391 (n³)	9787984279471
Square root of 21391	146.25662378163
Natural Logarithm (ln) of 21391	9.9707255518018
Decimal Logarithm (log) of 21391	4.3302310877193

Calculation was done in 0.0000059605 seconds

Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.

Sine of 21391	0.10418886552869
Cosecant of 21391	9.5979545887721
Cosine of 21391	-0.99455752990958
Secant of 21391	-1.0054722526619
Tangent of 21391	-0.10475901332541
Cotangent of 21391	-9.5457180079935

Calculation was done in 0.0000219345 seconds

Number parity

Parity is the property of an integer of whether it is even or odd.

Is 21391 an Even Number?

Is 21391 an Odd Number?

Yes, the number 21391 is an odd number.

Total number of all odd numbers from 1 to 21391 is 10696

Sum of all the odd numbers from 1 to 21391 are 114404416

The sum of all odd numbers is a perfect square: 114404416 = 10696

An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.

Previous odd number is 21389

Next odd number is 21393

Calculation was done in 0.0000061989 seconds

Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".

The spelling of 21391 in words is "twenty-one thousand three hundred ninety-one", meaning that:

21391 is not an aban number (as it contains the letter a)

21391 is not an eban number (as it contains the letter e)

21391 is not an iban number (as it contains the letter i)

21391 is not an oban number (as it contains the letter o)

21391 is not a tban number (as it contains the letter t)

21391 is not an uban number (as it contains the letter u)

Calculation was done in 0.0000028610 seconds

Numeral systems

How to write 21391 in other number systems?

Bengali numerals	২১৩৯১
Eastern Arabic numerals	٢١٬٣٩١
Hieroglyphs numeralsused in Ancient Egypt	𓂭𓂭𓆼𓍤𓎎𓏺
Khmer numerals	២១៣៩១
Japanese numerals	二万千三百九十一
Roman numerals	n/a
Thai numerals	๒๑๓๙๑

Calculation was done in 0.0001640320 seconds

Translation

How do you say 21391 in 38 different languages?

Arabic	واحد و عشرون ألف و ثلاثة مائة و واحد و تسعون
Croatian	dvadeset i jedna tisuća tristo devedeset i jedan
Czech	dvacet jedna tisíc tři sta devadesát jeden
Danish	en og tyve tusinde tre hundrede en og halvfems
Dutch	éénentwintigduizend driehonderdéénennegentig
Estonian	akpe blaeve vɔ ɖekɛ alafa etɔ̃ blaasieke vɔ ɖekɛ
Faroese	tjúgoeitt tusin og trýhundraðognítiein
Filipino	dalawáng pû’t isáng libó’t tatlóng daán at siyám na pû’t isá
Finnish	kaksikymmentäyksituhattakolmesataayhdeksänkymmentäyksi
French	vingt et un mille trois cent quatre-vingt-onze
Greek	είκοσι μία χίλιάδες τριακόσια εννενήντα ένα
German	einundzwanzigtausenddreihunderteinundneunzig
Hebrew	עשרים ואחד אלף שלוש מאות תשעים ואחת
Hindi	इक्कीस हज़ार तीन सौ इक्यानबे
Hungarian	huszonegyezerháromszázkilencvenegy
Icelandic	tuttugu og eitt þúsund og þrjúhundrað og níutíu og einn
Indonesian	dua puluh satu ribu tiga ratus sembilan puluh satu
Italian	ventunomilatrecentonovantuno
Japanese	二万千三百九十一
Korean	이만 천삼백구십일
Latvian	divdesmit viens tūkstoši trīssimt deviņdesmit viens
Lithuanian	dvidešimt vienas tūkstantis trys šimtai devyniasdešimt vienas
Norwegian	tjueett tusen tre hundre og nittién
Persian	بیست و یک هزار و سیصد و نود و یک
Polish	dwadzieścia jeden tysięcy trzysta dziewięćdziesiąt jeden
Portuguese	vinte e um mil trezentos e noventa e um
Romanian	douăzeci şi una mii trei sute nouăzeci şi unu
Russian	двадцать одна тысяча триста девяносто один
Serbian	двадесет и једна хиљада триста деведесет и један
Slovak	dvadsaťjedna tisíc tristo deväťdesiatjeden
Slovene	dvaset ena tisuću tristo devetdeset ena
Spanish	veintiún mil trescientos noventa y uno
Swahili	elfu ishirini na moja, mia tatu na tisini na moja
Swedish	tjugoentusentrehundranittioen
Thai	สองหมื่นหนึ่งพันสามร้อยเก้าสิบเอ็ด
Turkish	yirmi bir bin üç yüz doksan bir
Ukrainian	двадцять одна тисяча триста девʼяносто один
Vietnamese	hai mươi mốt nghìn ba trăm chín mươi mốt

Calculation was done in 0.0141470432 seconds

Miscellaneous

Number 21391 reversed	19312
Unicode Character	U+538F	厏
Unix Timestamp	Thu, 01 Jan 1970 05:56:31 +0000

Calculation was done in 0.0000271797 seconds

This page was generated in 0.11 seconds.