Names of 131991
| Nominal | 131991 |
| Cardinal | one hundred thirty-one thousand nine hundred ninety-one |
| Ordinal | 131,991st |
| This number as US currency | one hundred thirty-one thousand nine hundred ninety-one dollars |
| Is 131991 an odd number? | 131991 is an odd number |
| Is 131991 an even number? | 131991 is NOT an even number |
| Is 131991 a palindrome? | 131991 is NOT a palindrome number |
| Is 131991 a triangle number? | 131991 is NOT a triangle number |
131991 in other Bases
| Base 2 (Binary) | 1000000011100101112 |
| Base 3 (Ternary) | 202010011203 |
| Base 4 (Quaternary) | 2000321134 |
| Base 5 (Quinary) | 132104315 |
| Base 6 (Senary) | 24550236 |
| Base 8 (Octal) | 4016278 |
| Base 12 (Duodecimal) | 6447312 |
| Base 16 (Hexadecimal) | 2039716 |
| Base 20 (Vigesimal) | G9JB20 |
Primes and Factors tests for 131991
| Is 131991 a Prime Number? | 131991 is NOT a prime |
| Is 131991 a perfect number? | 131991 is NOT a perfect number |
| Is 131991 a Mersenne Prime? | 131991 is NOT a Mersenne prime |
| Is 131991 a Fermat Prime? | 131991 is NOT a Fermat prime |
| Is 131991 a Fibonacci Prime? | 131991 is NOT a Fibonacci prime |
| Is 131991 a Partition Prime? | 131991 is NOT a Partition prime |
| Is 131991 a Pell Prime? | 131991 is NOT a Pell prime |
| Prime Factors | Prime factors of 131991 |
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131991 in other Numerals
| 131991 in Roman Numeral | CXXXMCMXCI |
| 131991 in Chinese Numeral | 壹拾萬叄萬壹仟玖佰玖拾壹 |
| 131991 in Egyptian Numeral | 𓆐𓂯𓆼𓍪𓎎𓏺 |
| 131991 in Babylonian Numeral |    |
Roots and stuff for 131991
| Is 131991 a square number? | 131991 is NOT a square number |
| Is 131991 a cube number? | 131991 is NOT a cube number |
| Square root of the number 131991 | 363.30565643821 |
| Cube root of the number 131991 | 50.915276478619 |
Recreational math for 131991
| Number 131991 reversed | 199131 |
| Sum of the digits | 24 |
| No of digits | 6 |