Q: Is 243,815 a Prime Number?
A: No, 243,815 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 243815 can be evenly divided by 1 5 11 13 31 55 65 121 143 155 341 403 605 715 1,573 1,705 2,015 3,751 4,433 7,865 18,755 22,165 48,763 and 243,815, with no remainder.
Since 243,815 cannot be divided by just 1 and 243,815, it is not a prime number.