A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5217030 can be evenly divided by 1 2 3 5 6 7 9 10 13 14 15 18 21 26 30 35 39 42 45 49 63 65 70 78 90 91 98 105 117 126 130 147 169 182 195 210 234 245 273 294 315 338 343 390 441 455 490 507 546 585 630 637 686 735 819 845 882 910 1,014 1,029 1,170 1,183 1,274 1,365 1,470 1,521 1,638 1,690 1,715 1,911 2,058 2,205 2,366 2,535 2,730 3,042 3,087 3,185 3,430 3,549 3,822 4,095 4,410 4,459 5,070 5,145 5,733 5,915 6,174 6,370 7,098 7,605 8,190 8,281 8,918 9,555 10,290 10,647 11,466 11,830 13,377 15,210 15,435 16,562 17,745 19,110 21,294 22,295 24,843 26,754 28,665 30,870 35,490 40,131 41,405 44,590 49,686 53,235 57,330 57,967 66,885 74,529 80,262 82,810 106,470 115,934 124,215 133,770 149,058 173,901 200,655 248,430 289,835 347,802 372,645 401,310 521,703 579,670 745,290 869,505 1,043,406 1,739,010 2,608,515 and 5,217,030, with no remainder.
Since 5,217,030 cannot be divided by just 1 and 5,217,030, it is not a prime number.