Q: Is 211,491 a Prime Number?
A: No, 211,491 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 211491 can be evenly divided by 1 3 7 9 21 27 63 81 189 373 567 1,119 2,611 3,357 7,833 10,071 23,499 30,213 70,497 and 211,491, with no remainder.
Since 211,491 cannot be divided by just 1 and 211,491, it is not a prime number.