| Nominal | 81131 |
| Cardinal | eighty-one thousand one hundred thirty-one |
Cardinal eighty-one thousand one hundred thirty-one | |
| Ordinal | 81,131st |
| Number of digits | 5 |
| Sum of digits | 14 |
| Product of digits | 24 |
| Number parity | Odd |
| Prime factorization | 81131 |
| Prime factors | 81131 |
| Number of distinct prime factors ω(n) | 1 |
| Total number of prime factors Ω(n) | 1 |
| Sum of prime factors | 81131 |
| Product of prime factors | 81131 |
| Is 81131 a prime number? | Yes |
| Is 81131 a semiprime number? | No |
| Is 81131 a Chen prime number? | No |
| Is 81131 a Mersenne prime number? | No |
| Is 81131 a Catalan number? | No |
| Is 81131 a Fibonacci number? | No |
| Is 81131 a Idoneal number? | No |
| Square of 81131 (n2) | 6582239161 |
| Cube of 81131 (n3) | 534023645371091 |
| Square root of 81131 | 284.83503997928 |
| Natural Logarithm (ln) of 81131 | 11.30382041121 |
| Decimal Logarithm (log) of 81131 | 4.9091868290138 |
| Sine of 81131 | 0.58937013946991 |
| Cosecant of 81131 | 1.6967266120734 |
| Cosine of 81131 | -0.8078631311684 |
| Secant of 81131 | -1.237833441605 |
| Tangent of 81131 | -0.72954206811928 |
| Cotangent of 81131 | -1.3707228735664 |
| The spelling of 81131 in words is "eighty-one thousand one hundred thirty-one", meaning that: |
| 81131 is not an aban number (as it contains the letter a) |
| 81131 is not an eban number (as it contains the letter e) |
| 81131 is not an iban number (as it contains the letter i) |
| 81131 is not an oban number (as it contains the letter o) |
| 81131 is not a tban number (as it contains the letter t) |
| 81131 is not an uban number (as it contains the letter u) |
| Bengali numerals | ৮১১৩১ |
| Eastern Arabic numerals | ٨١٬١٣١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓂭𓂭𓂭𓂭𓂭𓂭𓆼𓍢𓎈𓏺 |
| Khmer numerals | ៨១១៣១ |
| Japanese numerals | 八万千百三十一 |
| Roman numerals | n/a |
| Thai numerals | ๘๑๑๓๑ |
| Arabic | واحد و ثمانون ألف و مائة و واحد و ثلاثون |
| Croatian | osamdeset i jedna tisuća sto trideset i jedan |
| Czech | osmdesát jedna tisíc sto třicet jeden |
| Danish | en og firs tusinde et hundrede en og tredive |
| Dutch | éénentachtigduizend honderdéénendertig |
| Estonian | akpe blaenyi vɔ ɖekɛ alafa ɖeka blaetɔ̃ vɔ ɖekɛ |
| Faroese | áttatieitt tusin og eitthundraðogtríatiein |
| Filipino | walóng pû’t isáng libó’t isáng daán at tatlóng pû’t isá |
| Finnish | kahdeksankymmentäyksituhattasatakolmekymmentäyksi |
| French | quatre-vingt-un mille cent trente et un |
| Greek | ογδόντα μία χίλιάδες εκατόν τριάντα ένα |
| German | einundachtzigtausendeinhunderteinunddreißig |
| Hebrew | שמונים ואחד אלף מאה שלושים ואחת |
| Hindi | इक्यासी हज़ार एक सौ इकतीस |
| Hungarian | nyolcvanegyezerszázharmincegy |
| Icelandic | áttatíu og eitt þúsund og eitthundrað og þrjátíu og einn |
| Indonesian | delapan puluh satu ribu seratus tiga puluh satu |
| Italian | ottant e unmilacentotrentuno |
| Japanese | 八万千百三十一 |
| Korean | 팔만 천백삼십일 |
| Latvian | astoņdesmit viens tūkstoši simt trīsdesmit viens |
| Lithuanian | aštuoniasdešimt vienas tūkstantis šimtas trisdešimt vienas |
| Norwegian | åttiett tusen hundre og trettién |
| Persian | هشتاد و یک هزار و صد و سی و یک |
| Polish | osiemdziesiąt jeden tysięcy sto trzydzieści jeden |
| Portuguese | oitenta e um mil cento e trinta e um |
| Romanian | optzeci şi una mii una sută treizeci şi unu |
| Russian | восемьдесят одна тысяча сто тридцать один |
| Serbian | осамдесет и једна хиљада сто тридесет и један |
| Slovak | osemdesiatjedna tisíc jednasto tridsaťjeden |
| Slovene | osemdeset ena tisuću sto trideset ena |
| Spanish | ochenta y un mil ciento treinta y uno |
| Swahili | elfu themanini na moja, mia moja na thelathini na moja |
| Swedish | åttioentusenenhundratrettioen |
| Thai | แปดหมื่นหนึ่งพันหนึ่งร้อยสามสิบเอ็ด |
| Turkish | seksen bir bin yüz otuz bir |
| Ukrainian | вісімдесят одна тисяча сто тридцять один |
| Vietnamese | tám mươi mốt nghìn một trăm ba mươi mốt |
| Number 81131 reversed | 13118 | |
| Unicode Character | U+13CEB | |
| Unix Timestamp | Thu, 01 Jan 1970 22:32:11 +0000 | |