Q: Is 511,643 a Prime Number?
A: No, 511,643 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 511643 can be evenly divided by 1 11 193 241 2,123 2,651 46,513 and 511,643, with no remainder.
Since 511,643 cannot be divided by just 1 and 511,643, it is not a prime number.