Q: Is 51,987 a Prime Number?
A: No, 51,987 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 51987 can be evenly divided by 1 3 13 31 39 43 93 129 403 559 1,209 1,333 1,677 3,999 17,329 and 51,987, with no remainder.
Since 51,987 cannot be divided by just 1 and 51,987, it is not a prime number.