Names of 81801
| Nominal | 81801 |
| Cardinal | eighty-one thousand eight hundred one |
| Ordinal | 81,801st |
| This number as US currency | eighty-one thousand eight hundred one dollars |
| Is 81801 an odd number? | 81801 is an odd number |
| Is 81801 an even number? | 81801 is NOT an even number |
| Is 81801 a palindrome? | 81801 is NOT a palindrome number |
| Is 81801 a triangle number? | 81801 is NOT a triangle number |
81801 in other Bases
| Base 2 (Binary) | 100111111100010012 |
| Base 3 (Ternary) | 110110122003 |
| Base 4 (Quaternary) | 1033320214 |
| Base 5 (Quinary) | 101042015 |
| Base 6 (Senary) | 14304136 |
| Base 8 (Octal) | 2376118 |
| Base 12 (Duodecimal) | 3B40912 |
| Base 16 (Hexadecimal) | 13F8916 |
| Base 20 (Vigesimal) | A4A120 |
Primes and Factors tests for 81801
| Is 81801 a Prime Number? | 81801 is NOT a prime |
| Is 81801 a perfect number? | 81801 is NOT a perfect number |
| Is 81801 a Mersenne Prime? | 81801 is NOT a Mersenne prime |
| Is 81801 a Fermat Prime? | 81801 is NOT a Fermat prime |
| Is 81801 a Fibonacci Prime? | 81801 is NOT a Fibonacci prime |
| Is 81801 a Partition Prime? | 81801 is NOT a Partition prime |
| Is 81801 a Pell Prime? | 81801 is NOT a Pell prime |
| Prime Factors | Prime factors of 81801 |
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81801 in other Numerals
| 81801 in Roman Numeral | LXXXMDCCCI |
| 81801 in Chinese Numeral | 捌萬壹仟捌佰壹 |
| 81801 in Egyptian Numeral | 𓂴𓆼𓍩𓏺 |
| 81801 in Babylonian Numeral |    |
Roots and stuff for 81801
| Is 81801 a square number? | 81801 is NOT a square number |
| Is 81801 a cube number? | 81801 is NOT a cube number |
| Square root of the number 81801 | 286.00874112516 |
| Cube root of the number 81801 | 43.409642006738 |
Recreational math for 81801
| Number 81801 reversed | 10818 |
| Sum of the digits | 18 |
| No of digits | 5 |