Q: Is 221,739 a Prime Number?
A: No, 221,739 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 221739 can be evenly divided by 1 3 7 21 10,559 31,677 73,913 and 221,739, with no remainder.
Since 221,739 cannot be divided by just 1 and 221,739, it is not a prime number.