Q: Is 31,000 a Prime Number?
A: No, 31,000 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 31000 can be evenly divided by 1 2 4 5 8 10 20 25 31 40 50 62 100 124 125 155 200 248 250 310 500 620 775 1,000 1,240 1,550 3,100 3,875 6,200 7,750 15,500 and 31,000, with no remainder.
Since 31,000 cannot be divided by just 1 and 31,000, it is not a prime number.