Q: Is 43,821 a Prime Number?
A: No, 43,821 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 43821 can be evenly divided by 1 3 9 27 81 541 1,623 4,869 14,607 and 43,821, with no remainder.
Since 43,821 cannot be divided by just 1 and 43,821, it is not a prime number.