Q: Is 31,900 a Prime Number?
A: No, 31,900 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 31900 can be evenly divided by 1 2 4 5 10 11 20 22 25 29 44 50 55 58 100 110 116 145 220 275 290 319 550 580 638 725 1,100 1,276 1,450 1,595 2,900 3,190 6,380 7,975 15,950 and 31,900, with no remainder.
Since 31,900 cannot be divided by just 1 and 31,900, it is not a prime number.