Q: Is 1,815 a Prime Number?
A: No, 1,815 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 1815 can be evenly divided by 1 3 5 11 15 33 55 121 165 363 605 and 1,815, with no remainder.
Since 1,815 cannot be divided by just 1 and 1,815, it is not a prime number.