Q: Is 221,427 a Prime Number?
A: No, 221,427 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 221427 can be evenly divided by 1 3 9 27 59 139 177 417 531 1,251 1,593 3,753 8,201 24,603 73,809 and 221,427, with no remainder.
Since 221,427 cannot be divided by just 1 and 221,427, it is not a prime number.