Q: Is 651 a Prime Number?
A: No, 651 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 651 can be evenly divided by 1 3 7 21 31 93 217 and 651, with no remainder.
Since 651 cannot be divided by just 1 and 651, it is not a prime number.