381
Everything about the number 381 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 381
| Nominal | 381 |
| Cardinal | three hundred eighty-one |
| Ordinal | 381st |
| This number as US currency | three hundred eighty-one dollars |
Properties (and some facts) of 381
| 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 |
| Is 381 a triangle number? | 381 is not a triangle number |
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381 in other bases
| Base 2 (Binary) | 101111101 |
| Base 3 (Ternary) | 112010 |
| Base 4 (Quaternary) | 11331 |
| Base 5 (Quinary) | 3011 |
| Base 6 (Senary) | 1433 |
| Base 8 (Octal) | 575 |
| Base 12 (Duodecimal) | 279 |
| Base 16 (Hexadecimal) | 17D |
| Base 20 (Vigesimal) | J1 |
Primes and factors tests for 381
| Is 381 a prime number? | 381 is not a prime number |
| 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 |
381 in other numeral systems
| 381 in Roman numerals | CCCLXXXI |
| 381 in Chinese numerals | 叄佰捌拾壹 |
| 381 in Babylonian numerals |   |
| 381 in Egyptian numerals | 𓍤𓎍𓏺 |
Roots and squares 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 381 | 19.519221295943 |
| Cube root of 381 | 7.249504524205 |
Recreational math for 381
| Number 381 reversed | 183 |
| Sum of the digits | 12 |
| Number of digits | 3 |
Arithmetic tables for 381
Other pages about 381
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