Q: Is 2,166,225 a Prime Number?
A: No, 2,166,225 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 2166225 can be evenly divided by 1 3 5 15 17 25 51 75 85 255 425 1,275 1,699 5,097 8,495 25,485 28,883 42,475 86,649 127,425 144,415 433,245 722,075 and 2,166,225, with no remainder.
Since 2,166,225 cannot be divided by just 1 and 2,166,225, it is not a prime number.