Q: Is 243,355 a Prime Number?
A: No, 243,355 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 243355 can be evenly divided by 1 5 7 17 35 85 119 409 595 2,045 2,863 6,953 14,315 34,765 48,671 and 243,355, with no remainder.
Since 243,355 cannot be divided by just 1 and 243,355, it is not a prime number.