Q: Is 543,221 a Prime Number?
A: No, 543,221 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 543221 can be evenly divided by 1 7 71 497 1,093 7,651 77,603 and 543,221, with no remainder.
Since 543,221 cannot be divided by just 1 and 543,221, it is not a prime number.