Q: Is 221,438 a Prime Number?
A: No, 221,438 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 221438 can be evenly divided by 1 2 7 14 15,817 31,634 110,719 and 221,438, with no remainder.
Since 221,438 cannot be divided by just 1 and 221,438, it is not a prime number.