1026, 1539, 2052, 2565 . . .
57, 114, 171, 228, 285, 342, 399, 456, 513, 570, 627, . . .
57, 114, 171, 228, 285, 342, 399, 456, 513, 570.
57, 114, 171, 228, 285, 342, 399, 456, 513, 570, 627, 684, . . .
Infinite. The first ten are: 57, 114, 171, 228, 285, 342, 399, 456, 513, 570.
The first 20 multiples of 27 are: 27, 54, 81, 108, 135, 162, 189, 216, 243, 270, 297, 324, 351, 378, 405, 432, 459, 486, 513, 540
521 years ago.
3x117=513 or 513/3=117 or 513/117=3
Yes, 513 is composite. The factors of 513 are: 1, 3, 9, 19, 27, 57, 171, 513.
6z-513 = -507
9*57=513
513 = 201