Q: Is 321,320 a Prime Number?
A: No, 321,320 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 321320 can be evenly divided by 1 2 4 5 8 10 20 29 40 58 116 145 232 277 290 554 580 1,108 1,160 1,385 2,216 2,770 5,540 8,033 11,080 16,066 32,132 40,165 64,264 80,330 160,660 and 321,320, with no remainder.
Since 321,320 cannot be divided by just 1 and 321,320, it is not a prime number.