odd, prime · 331st positive integer
The number 331
331 is an odd prime number. It is the 331st positive integer.
Quick reference
| Prime factorization | 331 (prime) |
| Divisors | 1, 331 |
| Binary | 101001011 |
| Hexadecimal | 0x14B |
| Roman numeral | CCCXXXI |
| Digit sum | 7 |
| Properties | odd, prime |
Frequently asked
Is 331 a prime number?
Yes. 331 is prime — its only divisors are 1 and itself.
What are the factors of 331?
The factors (divisors) of 331 are 1, 331.
What is 331 in binary?
331 in binary is 101001011. In hexadecimal it's 14B.
What is 331 as a Roman numeral?
331 in Roman numerals is CCCXXXI.
What's the digit sum of 331?
Adding the digits of 331: 3 + 3 + 1 = 7.