Q: Is 21,527 a Prime Number?
A: No, 21,527 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 21527 can be evenly divided by 1 11 19 103 209 1,133 1,957 and 21,527, with no remainder.
Since 21,527 cannot be divided by just 1 and 21,527, it is not a prime number.