Q: Is 5,431,209 a Prime Number?
A: No, 5,431,209 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 5431209 can be evenly divided by 1 3 7 21 49 147 36,947 110,841 258,629 775,887 1,810,403 and 5,431,209, with no remainder.
Since 5,431,209 cannot be divided by just 1 and 5,431,209, it is not a prime number.