Q: Is 55,421 a Prime Number?
A: No, 55,421 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 55421 can be evenly divided by 1 157 353 and 55,421, with no remainder.
Since 55,421 cannot be divided by just 1 and 55,421, it is not a prime number.