Q: Is 513,561 a Prime Number?
A: No, 513,561 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 513561 can be evenly divided by 1 3 29 87 5,903 17,709 171,187 and 513,561, with no remainder.
Since 513,561 cannot be divided by just 1 and 513,561, it is not a prime number.