Names of 381
| Nominal | 381 |
| Cardinal | three hundred eighty-one |
| Ordinal | 381st |
| This number as US currency | three hundred eighty-one dollars |
| Is 381 an odd number? | 381 is an odd number |
| Is 381 an even number? | 381 is NOT an even number |
| Is 381 a palindrome? | 381 is NOT a palindrome number |
| Is 381 a triangle number? | 381 is NOT a triangle number |
381 in other Bases
| Base 2 (Binary) | 1011111012 |
| Base 3 (Ternary) | 1120103 |
| Base 4 (Quaternary) | 113314 |
| Base 5 (Quinary) | 30115 |
| Base 6 (Senary) | 14336 |
| Base 8 (Octal) | 5758 |
| Base 12 (Duodecimal) | 27912 |
| Base 16 (Hexadecimal) | 17D16 |
| Base 20 (Vigesimal) | J120 |
Primes and Factors tests for 381
| Is 381 a Prime Number? | 381 is NOT a prime |
| Is 381 a perfect number? | 381 is NOT a perfect number |
| Is 381 a Mersenne Prime? | 381 is NOT a Mersenne prime |
| Is 381 a Fermat Prime? | 381 is NOT a Fermat prime |
| Is 381 a Fibonacci Prime? | 381 is NOT a Fibonacci prime |
| Is 381 a Partition Prime? | 381 is NOT a Partition prime |
| Is 381 a Pell Prime? | 381 is NOT a Pell prime |
| Prime Factors | Prime factors of 381 |
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381 in other Numerals
| 381 in Roman Numeral | CCCLXXXI |
| 381 in Chinese Numeral | 叄佰捌拾壹 |
| 381 in Egyptian Numeral | 𓍤𓎍𓏺 |
| 381 in Babylonian Numeral |   |
Roots and stuff for 381
| Is 381 a square number? | 381 is NOT a square number |
| Is 381 a cube number? | 381 is NOT a cube number |
| Square root of the number 381 | 19.519221295943 |
| Cube root of the number 381 | 7.249504524205 |
Recreational math for 381
| Number 381 reversed | 183 |
| Sum of the digits | 12 |
| No of digits | 3 |