Q: Is 243,375 a Prime Number?
A: No, 243,375 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 243375 can be evenly divided by 1 3 5 11 15 25 33 55 59 75 125 165 177 275 295 375 649 825 885 1,375 1,475 1,947 3,245 4,125 4,425 7,375 9,735 16,225 22,125 48,675 81,125 and 243,375, with no remainder.
Since 243,375 cannot be divided by just 1 and 243,375, it is not a prime number.