Q: Is 15,509 a Prime Number?
A: No, 15,509 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 15509 can be evenly divided by 1 13 1,193 and 15,509, with no remainder.
Since 15,509 cannot be divided by just 1 and 15,509, it is not a prime number.