Q: Is 243,221 a Prime Number?
A: No, 243,221 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 243221 can be evenly divided by 1 11 22,111 and 243,221, with no remainder.
Since 243,221 cannot be divided by just 1 and 243,221, it is not a prime number.