Q: Is 331,378 a Prime Number?
A: No, 331,378 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 331378 can be evenly divided by 1 2 223 446 743 1,486 165,689 and 331,378, with no remainder.
Since 331,378 cannot be divided by just 1 and 331,378, it is not a prime number.