Q: Is 5,221,428 a Prime Number?
A: No, 5,221,428 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 5221428 can be evenly divided by 1 2 3 4 6 12 19 38 57 76 114 228 22,901 45,802 68,703 91,604 137,406 274,812 435,119 870,238 1,305,357 1,740,476 2,610,714 and 5,221,428, with no remainder.
Since 5,221,428 cannot be divided by just 1 and 5,221,428, it is not a prime number.