A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5343712 can be evenly divided by 1 2 4 8 11 16 17 19 22 32 34 38 44 47 68 76 88 94 136 152 176 187 188 209 272 304 323 352 374 376 418 517 544 608 646 748 752 799 836 893 1,034 1,292 1,496 1,504 1,598 1,672 1,786 2,068 2,584 2,992 3,196 3,344 3,553 3,572 4,136 5,168 5,984 6,392 6,688 7,106 7,144 8,272 8,789 9,823 10,336 12,784 14,212 14,288 15,181 16,544 17,578 19,646 25,568 28,424 28,576 30,362 35,156 39,292 56,848 60,724 70,312 78,584 113,696 121,448 140,624 157,168 166,991 242,896 281,248 314,336 333,982 485,792 667,964 1,335,928 2,671,856 and 5,343,712, with no remainder.
Since 5,343,712 cannot be divided by just 1 and 5,343,712, it is not a prime number.