Q: Is 221,804 a Prime Number?
A: No, 221,804 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 221804 can be evenly divided by 1 2 4 11 22 44 71 142 284 781 1,562 3,124 5,041 10,082 20,164 55,451 110,902 and 221,804, with no remainder.
Since 221,804 cannot be divided by just 1 and 221,804, it is not a prime number.