Q: Is 31,621 a Prime Number?
A: No, 31,621 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 31621 can be evenly divided by 1 103 307 and 31,621, with no remainder.
Since 31,621 cannot be divided by just 1 and 31,621, it is not a prime number.