Q: Is 563,621 a Prime Number?
A: No, 563,621 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 563621 can be evenly divided by 1 37 15,233 and 563,621, with no remainder.
Since 563,621 cannot be divided by just 1 and 563,621, it is not a prime number.