Well, darling, 517 divided by 9 is 57 with a remainder of 4. So, technically speaking, the answer is 57.44444444, but we don't need to get all fancy with decimals here. Just remember, you can't always divide things perfectly, just like you can't always find a decent cup of coffee at 3 am.
16.1562
517 divided 2 n = 258.5
517 divided by 6 equals 86 with a remainder of 1.
517, 1034, 1551, etc. (numbers that are multiples of 517) can be divided by 517.
16.1562
258.5
No, 517 is not a prime number as it can be divided by 11.
16.1562
258.5
530
258.5
517