Q: Is 31,891 a Prime Number?
A: Yes, 31,891 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 31891 can be evenly divided by 1 and 31,891, with no remainder.
Since 31,891 can be divided by just 1 and 31,891, it is a prime number.