Q: Is 221,072 a Prime Number?
A: No, 221,072 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 221072 can be evenly divided by 1 2 4 8 16 41 82 164 328 337 656 674 1,348 2,696 5,392 13,817 27,634 55,268 110,536 and 221,072, with no remainder.
Since 221,072 cannot be divided by just 1 and 221,072, it is not a prime number.