Q: Is 16,215 a Prime Number?
A: No, 16,215 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 16215 can be evenly divided by 1 3 5 15 23 47 69 115 141 235 345 705 1,081 3,243 5,405 and 16,215, with no remainder.
Since 16,215 cannot be divided by just 1 and 16,215, it is not a prime number.