Q: Is 51,509 a Prime Number?
A: No, 51,509 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 51509 can be evenly divided by 1 19 2,711 and 51,509, with no remainder.
Since 51,509 cannot be divided by just 1 and 51,509, it is not a prime number.