Q: Is 2,167,221 a Prime Number?
A: No, 2,167,221 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 2167221 can be evenly divided by 1 3 7 21 23 49 69 147 161 483 641 1,127 1,923 3,381 4,487 13,461 14,743 31,409 44,229 94,227 103,201 309,603 722,407 and 2,167,221, with no remainder.
Since 2,167,221 cannot be divided by just 1 and 2,167,221, it is not a prime number.