Q: Is 216,820 a Prime Number?
A: No, 216,820 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 216820 can be evenly divided by 1 2 4 5 10 20 37 74 148 185 293 370 586 740 1,172 1,465 2,930 5,860 10,841 21,682 43,364 54,205 108,410 and 216,820, with no remainder.
Since 216,820 cannot be divided by just 1 and 216,820, it is not a prime number.