Q: Is 513,391 a Prime Number?
A: No, 513,391 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 513391 can be evenly divided by 1 31 16,561 and 513,391, with no remainder.
Since 513,391 cannot be divided by just 1 and 513,391, it is not a prime number.