| Nominal | 21155 |
| Cardinal | twenty-one thousand one hundred fifty-five |
Cardinal twenty-one thousand one hundred fifty-five | |
| Ordinal | 21,155th |
| Number of digits | 5 |
| Sum of digits | 14 |
| Product of digits | 50 |
| Number parity | Odd |
| Prime factorization | 5 x 4231 |
| Prime factors | 5, 4231 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 4236 |
| Product of prime factors | 21155 |
| Is 21155 a prime number? | No |
| Is 21155 a semiprime number? | Yes |
| Is 21155 a Chen prime number? | No |
| Is 21155 a Mersenne prime number? | No |
| Is 21155 a Catalan number? | No |
| Is 21155 a Fibonacci number? | No |
| Is 21155 a Idoneal number? | No |
| Square of 21155 (n2) | 447534025 |
| Cube of 21155 (n3) | 9467582298875 |
| Square root of 21155 | 145.44758506074 |
| Natural Logarithm (ln) of 21155 | 9.9596315631542 |
| Decimal Logarithm (log) of 21155 | 4.3254130296673 |
| Sine of 21155 | -0.46614578846823 |
| Cosecant of 21155 | -2.1452516031219 |
| Cosine of 21155 | 0.8847079201032 |
| Secant of 21155 | 1.1303165454689 |
| Tangent of 21155 | -0.52689229730627 |
| Cotangent of 21155 | -1.897921083896 |
| The spelling of 21155 in words is "twenty-one thousand one hundred fifty-five", meaning that: |
| 21155 is not an aban number (as it contains the letter a) |
| 21155 is not an eban number (as it contains the letter e) |
| 21155 is not an iban number (as it contains the letter i) |
| 21155 is not an oban number (as it contains the letter o) |
| 21155 is not a tban number (as it contains the letter t) |
| 21155 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১১৫৫ |
| Eastern Arabic numerals | ٢١٬١٥٥ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍢𓎊𓏾 |
| Khmer numerals | ២១១៥៥ |
| Japanese numerals | 二万千百五十五 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๑๕๕ |
| Arabic | واحد و عشرون ألف و مائة و خمسة و خمسون |
| Croatian | dvadeset i jedna tisuća sto pedeset i pet |
| Czech | dvacet jedna tisíc sto padesát pět |
| Danish | en og tyve tusinde et hundrede fem og halvtreds |
| Dutch | éénentwintigduizend honderdvijfenvijftig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa ɖeka blaatɔ̃ vɔ atɔ̃ |
| Faroese | tjúgoeitt tusin og eitthundraðogfimmtifimm |
| Filipino | dalawáng pû’t isáng libó’t isáng daán at limáng pû’t limá |
| Finnish | kaksikymmentäyksituhattasataviisikymmentäviisi |
| French | vingt et un mille cent cinquante-cinq |
| Greek | είκοσι μία χίλιάδες εκατόν πενήντα πέντε |
| German | einundzwanzigtausendeinhundertfünfundfünfzig |
| Hebrew | עשרים ואחד אלף מאה חמישים וחמש |
| Hindi | इक्कीस हज़ार एक सौ पचपन |
| Hungarian | huszonegyezerszázötvenöt |
| Icelandic | tuttugu og eitt þúsund og eitthundrað og fimmtíu og fimm |
| Indonesian | dua puluh satu ribu seratus lima puluh lima |
| Italian | ventunomilacentocinquantacinque |
| Japanese | 二万千百五十五 |
| Korean | 이만 천백오십오 |
| Latvian | divdesmit viens tūkstoši simt piecdesmit pieci |
| Lithuanian | dvidešimt vienas tūkstantis šimtas penkiasdešimt penki |
| Norwegian | tjueett tusen hundre og femtifem |
| Persian | بیست و یک هزار و صد و پنجاه و پنج |
| Polish | dwadzieścia jeden tysięcy sto pięćdziesiąt pięć |
| Portuguese | vinte e um mil cento e cinquenta e cinco |
| Romanian | douăzeci şi una mii una sută cincizeci şi cinci |
| Russian | двадцать одна тысяча сто пятьдесят пять |
| Serbian | двадесет и једна хиљада сто педесет и пет |
| Slovak | dvadsaťjedna tisíc jednasto päťdesiatpäť |
| Slovene | dvaset ena tisuću sto petdeset pet |
| Spanish | veintiún mil ciento cincuenta y cinco |
| Swahili | elfu ishirini na moja, mia moja na hamsini na tano |
| Swedish | tjugoentusenenhundrafemtiofem |
| Thai | สองหมื่นหนึ่งพันหนึ่งร้อยห้าสิบห้า |
| Turkish | yirmi bir bin yüz elli beş |
| Ukrainian | двадцять одна тисяча сто пʼятдесят пʼять |
| Vietnamese | hai mươi mốt nghìn một trăm năm mươi lăm |
| Number 21155 reversed | 55112 | |
| Unicode Character | U+52A3 | 劣 |
| Unix Timestamp | Thu, 01 Jan 1970 05:52:35 +0000 | |