Q: Is 221,430 a Prime Number?
A: No, 221,430 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 221430 can be evenly divided by 1 2 3 5 6 10 11 15 22 30 33 55 61 66 110 121 122 165 183 242 305 330 363 366 605 610 671 726 915 1,210 1,342 1,815 1,830 2,013 3,355 3,630 4,026 6,710 7,381 10,065 14,762 20,130 22,143 36,905 44,286 73,810 110,715 and 221,430, with no remainder.
Since 221,430 cannot be divided by just 1 and 221,430, it is not a prime number.