Q: Is 221,397 a Prime Number?
A: No, 221,397 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 221397 can be evenly divided by 1 3 11 33 6,709 20,127 73,799 and 221,397, with no remainder.
Since 221,397 cannot be divided by just 1 and 221,397, it is not a prime number.