Q: Is 215,625 a Prime Number?
A: No, 215,625 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 215625 can be evenly divided by 1 3 5 15 23 25 69 75 115 125 345 375 575 625 1,725 1,875 2,875 3,125 8,625 9,375 14,375 43,125 71,875 and 215,625, with no remainder.
Since 215,625 cannot be divided by just 1 and 215,625, it is not a prime number.