Q: Is 243,255 a Prime Number?
A: No, 243,255 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 243255 can be evenly divided by 1 3 5 15 16,217 48,651 81,085 and 243,255, with no remainder.
Since 243,255 cannot be divided by just 1 and 243,255, it is not a prime number.