Q: Is 221,731 a Prime Number?
A: No, 221,731 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 221731 can be evenly divided by 1 17 13,043 and 221,731, with no remainder.
Since 221,731 cannot be divided by just 1 and 221,731, it is not a prime number.