Names of 1851
| Nominal | 1851 |
| Cardinal | one thousand eight hundred fifty-one |
| Ordinal | 1,851st |
| This number as US currency | one thousand eight hundred fifty-one dollars |
| Is 1851 an odd number? | 1851 is an odd number |
| Is 1851 an even number? | 1851 is NOT an even number |
| Is 1851 a palindrome? | 1851 is NOT a palindrome number |
| Is 1851 a triangle number? | 1851 is NOT a triangle number |
1851 in other Bases
| Base 2 (Binary) | 111001110112 |
| Base 3 (Ternary) | 21121203 |
| Base 4 (Quaternary) | 1303234 |
| Base 5 (Quinary) | 244015 |
| Base 6 (Senary) | 123236 |
| Base 8 (Octal) | 34738 |
| Base 12 (Duodecimal) | 10A312 |
| Base 16 (Hexadecimal) | 73B16 |
| Base 20 (Vigesimal) | 4CB20 |
Primes and Factors tests for 1851
| Is 1851 a Prime Number? | 1851 is NOT a prime |
| Is 1851 a perfect number? | 1851 is NOT a perfect number |
| Is 1851 a Mersenne Prime? | 1851 is NOT a Mersenne prime |
| Is 1851 a Fermat Prime? | 1851 is NOT a Fermat prime |
| Is 1851 a Fibonacci Prime? | 1851 is NOT a Fibonacci prime |
| Is 1851 a Partition Prime? | 1851 is NOT a Partition prime |
| Is 1851 a Pell Prime? | 1851 is NOT a Pell prime |
| Prime Factors | Prime factors of 1851 |
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1851 in other Numerals
| 1851 in Roman Numeral | MDCCCLI |
| 1851 in Chinese Numeral | 壹仟捌佰伍拾壹 |
| 1851 in Egyptian Numeral | 𓆼𓍩𓎊𓏺 |
| 1851 in Babylonian Numeral |   |
Roots and stuff for 1851
| Is 1851 a square number? | 1851 is NOT a square number |
| Is 1851 a cube number? | 1851 is NOT a cube number |
| Square root of the number 1851 | 43.023249528598 |
| Cube root of the number 1851 | 12.278221757243 |
Recreational math for 1851
| Number 1851 reversed | 1581 |
| Sum of the digits | 15 |
| No of digits | 4 |