Q: Is 513 a Prime Number?
A: No, 513 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 513 can be evenly divided by 1 3 9 19 27 57 171 and 513, with no remainder.
Since 513 cannot be divided by just 1 and 513, it is not a prime number.