A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5130216 can be evenly divided by 1 2 3 4 6 7 8 9 12 13 14 18 21 24 26 27 28 29 36 39 42 52 54 56 58 63 72 78 81 84 87 91 104 108 116 117 126 156 162 168 174 182 189 203 216 232 234 243 252 261 273 312 324 348 351 364 377 378 406 468 486 504 522 546 567 609 648 696 702 728 754 756 783 812 819 936 972 1,044 1,053 1,092 1,131 1,134 1,218 1,404 1,508 1,512 1,566 1,624 1,638 1,701 1,827 1,944 2,088 2,106 2,184 2,262 2,268 2,349 2,436 2,457 2,639 2,808 3,016 3,132 3,159 3,276 3,393 3,402 3,654 4,212 4,524 4,536 4,698 4,872 4,914 5,278 5,481 6,264 6,318 6,552 6,786 6,804 7,047 7,308 7,371 7,917 8,424 9,048 9,396 9,828 10,179 10,556 10,962 12,636 13,572 13,608 14,094 14,616 14,742 15,834 16,443 18,792 19,656 20,358 21,112 21,924 22,113 23,751 25,272 27,144 28,188 29,484 30,537 31,668 32,886 40,716 43,848 44,226 47,502 49,329 56,376 58,968 61,074 63,336 65,772 71,253 81,432 88,452 91,611 95,004 98,658 122,148 131,544 142,506 176,904 183,222 190,008 197,316 213,759 244,296 285,012 366,444 394,632 427,518 570,024 641,277 732,888 855,036 1,282,554 1,710,072 2,565,108 and 5,130,216, with no remainder.
Since 5,130,216 cannot be divided by just 1 and 5,130,216, it is not a prime number.