Q: Is 216,840 a Prime Number?
A: No, 216,840 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 216840 can be evenly divided by 1 2 3 4 5 6 8 10 12 13 15 20 24 26 30 39 40 52 60 65 78 104 120 130 139 156 195 260 278 312 390 417 520 556 695 780 834 1,112 1,390 1,560 1,668 1,807 2,085 2,780 3,336 3,614 4,170 5,421 5,560 7,228 8,340 9,035 10,842 14,456 16,680 18,070 21,684 27,105 36,140 43,368 54,210 72,280 108,420 and 216,840, with no remainder.
Since 216,840 cannot be divided by just 1 and 216,840, it is not a prime number.