| Nominal | 2591 |
| Cardinal | two thousand five hundred ninety-one |
Cardinal two thousand five hundred ninety-one | |
| Ordinal | 2,591st |
| Number of digits | 4 |
| Sum of digits | 17 |
| Product of digits | 90 |
| Number parity | Odd |
| Prime factorization | 2591 |
| Prime factors | 2591 |
| Number of distinct prime factors ω(n) | 1 |
| Total number of prime factors Ω(n) | 1 |
| Sum of prime factors | 2591 |
| Product of prime factors | 2591 |
| Is 2591 a prime number? | Yes |
| Is 2591 a semiprime number? | No |
| Is 2591 a Chen prime number? | Yes |
| Is 2591 a Mersenne prime number? | No |
| Is 2591 a Catalan number? | No |
| Is 2591 a Fibonacci number? | No |
| Is 2591 a Idoneal number? | No |
| Square of 2591 (n2) | 6713281 |
| Cube of 2591 (n3) | 17394111071 |
| Square root of 2591 | 50.901866370498 |
| Natural Logarithm (ln) of 2591 | 7.8597991805621 |
| Decimal Logarithm (log) of 2591 | 3.4134674129858 |
| Sine of 2591 | 0.72699762804157 |
| Cosecant of 2591 | 1.3755203062957 |
| Cosine of 2591 | -0.68663997030607 |
| Secant of 2591 | -1.4563673005436 |
| Tangent of 2591 | -1.0587755730525 |
| Cotangent of 2591 | -0.94448722227029 |
| The spelling of 2591 in words is "two thousand five hundred ninety-one", meaning that: |
| 2591 is not an aban number (as it contains the letter a) |
| 2591 is not an eban number (as it contains the letter e) |
| 2591 is not an iban number (as it contains the letter i) |
| 2591 is not an oban number (as it contains the letter o) |
| 2591 is not a tban number (as it contains the letter t) |
| 2591 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২৫৯১ |
| Eastern Arabic numerals | ٢٬٥٩١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓆼𓆼𓍦𓎎𓏺 |
| Khmer numerals | ២៥៩១ |
| Japanese numerals | 二千五百九十一 |
| Roman numerals | MMDXCI |
| Thai numerals | ๒๕๙๑ |
| Arabic | ألفين و خمسة مائة و واحد و تسعون |
| Croatian | dvije tisuće petsto devedeset i jedan |
| Czech | dvě tisíce pět set devadesát jeden |
| Danish | to tusinde fem hundrede en og halvfems |
| Dutch | tweeduizend vijfhonderdéénennegentig |
| Estonian | akpe eve alafa atɔ̃ blaasieke vɔ ɖekɛ |
| Faroese | tvey tusin og fimmhundraðognítiein |
| Filipino | dalawáng libó’t limáng daán at siyám na pû’t isá |
| Finnish | kaksituhattaviisisataayhdeksänkymmentäyksi |
| French | deux mille cinq cent quatre-vingt-onze |
| Greek | δύο χίλιάδες πεντακόσια εννενήντα ένα |
| German | zweitausendfünfhunderteinundneunzig |
| Hebrew | אלפיים חמש מאות תשעים ואחת |
| Hindi | दो हज़ार पाँच सौ इक्यानबे |
| Hungarian | kétezerötszázkilencvenegy |
| Icelandic | tvö þúsund og fimmhundrað og níutíu og einn |
| Indonesian | dua ribu lima ratus sembilan puluh satu |
| Italian | duemilacinquecentonovantuno |
| Japanese | 二千五百九十一 |
| Korean | 이천오백구십일 |
| Latvian | divtūkstoš piecsimt deviņdesmit viens |
| Lithuanian | du tūkstančiai penki šimtai devyniasdešimt vienas |
| Norwegian | to tusen fem hundre og nittién |
| Persian | دو هزار و پانصد و نود و یک |
| Polish | dwa tysiące pięćset dziewięćdziesiąt jeden |
| Portuguese | dois mil quinhentos e noventa e um |
| Romanian | două mii cinci sute nouăzeci şi unu |
| Russian | две тысячи пятьсот девяносто один |
| Serbian | две хиљада петсто деведесет и један |
| Slovak | dve tisíc päťsto deväťdesiatjeden |
| Slovene | dvije tisuće petsto devetdeset ena |
| Spanish | dos mil quinientos noventa y uno |
| Swahili | elfu mbili, mia tano na tisini na moja |
| Swedish | tvåtusenfemhundranittioen |
| Thai | สองพันห้าร้อยเก้าสิบเอ็ด |
| Turkish | iki bin beş yüz doksan bir |
| Ukrainian | дві тисячі пʼятсот девʼяносто один |
| Vietnamese | hai nghìn năm trăm chín mươi mốt |
| Number 2591 reversed | 1952 | |
| Unicode Character | U+0A1F | ਟ |
| Unix Timestamp | Thu, 01 Jan 1970 00:43:11 +0000 | |