Q: Is 5,221,431 a Prime Number?
A: No, 5,221,431 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 5221431 can be evenly divided by 1 3 9 17 51 153 34,127 102,381 307,143 580,159 1,740,477 and 5,221,431, with no remainder.
Since 5,221,431 cannot be divided by just 1 and 5,221,431, it is not a prime number.