Q: Is 216,640 a Prime Number?
A: No, 216,640 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 216640 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 160 320 677 1,354 2,708 3,385 5,416 6,770 10,832 13,540 21,664 27,080 43,328 54,160 108,320 and 216,640, with no remainder.
Since 216,640 cannot be divided by just 1 and 216,640, it is not a prime number.