Q: Is 557,221 a Prime Number?
A: No, 557,221 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 557221 can be evenly divided by 1 7 23 161 3,461 24,227 79,603 and 557,221, with no remainder.
Since 557,221 cannot be divided by just 1 and 557,221, it is not a prime number.