Q: Is 31,408 a Prime Number?
A: No, 31,408 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 31408 can be evenly divided by 1 2 4 8 13 16 26 52 104 151 208 302 604 1,208 1,963 2,416 3,926 7,852 15,704 and 31,408, with no remainder.
Since 31,408 cannot be divided by just 1 and 31,408, it is not a prime number.