Names of 81985
| Nominal | 81985 |
| Cardinal | eighty-one thousand nine hundred eighty-five |
| Ordinal | 81,985th |
| This number as US currency | eighty-one thousand nine hundred eighty-five dollars |
| Is 81985 an odd number? | 81985 is an odd number |
| Is 81985 an even number? | 81985 is NOT an even number |
| Is 81985 a palindrome? | 81985 is NOT a palindrome number |
| Is 81985 a triangle number? | 81985 is NOT a triangle number |
81985 in other Bases
| Base 2 (Binary) | 101000000010000012 |
| Base 3 (Ternary) | 110111101113 |
| Base 4 (Quaternary) | 1100010014 |
| Base 5 (Quinary) | 101104205 |
| Base 6 (Senary) | 14313216 |
| Base 8 (Octal) | 2401018 |
| Base 12 (Duodecimal) | 3B54112 |
| Base 16 (Hexadecimal) | 1404116 |
| Base 20 (Vigesimal) | A4J520 |
Primes and Factors tests for 81985
| Is 81985 a Prime Number? | 81985 is NOT a prime |
| Is 81985 a perfect number? | 81985 is NOT a perfect number |
| Is 81985 a Mersenne Prime? | 81985 is NOT a Mersenne prime |
| Is 81985 a Fermat Prime? | 81985 is NOT a Fermat prime |
| Is 81985 a Fibonacci Prime? | 81985 is NOT a Fibonacci prime |
| Is 81985 a Partition Prime? | 81985 is NOT a Partition prime |
| Is 81985 a Pell Prime? | 81985 is NOT a Pell prime |
| Prime Factors | Prime factors of 81985 |
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81985 in other Numerals
| 81985 in Roman Numeral | LXXXMCMLXXXV |
| 81985 in Chinese Numeral | 捌萬壹仟玖佰捌拾伍 |
| 81985 in Egyptian Numeral | 𓂴𓆼𓍪𓎍𓏾 |
| 81985 in Babylonian Numeral |    |
Roots and stuff for 81985
| Is 81985 a square number? | 81985 is NOT a square number |
| Is 81985 a cube number? | 81985 is NOT a cube number |
| Square root of the number 81985 | 286.33022893156 |
| Cube root of the number 81985 | 43.442165622064 |
Recreational math for 81985
| Number 81985 reversed | 58918 |
| Sum of the digits | 31 |
| No of digits | 5 |