Q: Is 331,000 a Prime Number?
A: No, 331,000 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 331000 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 125 200 250 331 500 662 1,000 1,324 1,655 2,648 3,310 6,620 8,275 13,240 16,550 33,100 41,375 66,200 82,750 165,500 and 331,000, with no remainder.
Since 331,000 cannot be divided by just 1 and 331,000, it is not a prime number.