Q: Is 331,215 a Prime Number?
A: No, 331,215 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 331215 can be evenly divided by 1 3 5 15 71 213 311 355 933 1,065 1,555 4,665 22,081 66,243 110,405 and 331,215, with no remainder.
Since 331,215 cannot be divided by just 1 and 331,215, it is not a prime number.