Q: Is 21,535 a Prime Number?
A: No, 21,535 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 21535 can be evenly divided by 1 5 59 73 295 365 4,307 and 21,535, with no remainder.
Since 21,535 cannot be divided by just 1 and 21,535, it is not a prime number.