Q: Is 221,361 a Prime Number?
A: No, 221,361 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 221361 can be evenly divided by 1 3 7 21 83 127 249 381 581 889 1,743 2,667 10,541 31,623 73,787 and 221,361, with no remainder.
Since 221,361 cannot be divided by just 1 and 221,361, it is not a prime number.