A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6227312 can be evenly divided by 1 2 4 7 8 13 14 16 26 28 47 49 52 56 91 94 98 104 112 169 182 188 196 208 329 338 364 376 392 611 637 658 676 728 752 784 1,183 1,222 1,274 1,316 1,352 1,456 2,303 2,366 2,444 2,548 2,632 2,704 4,277 4,606 4,732 4,888 5,096 5,264 7,943 8,281 8,554 9,212 9,464 9,776 10,192 15,886 16,562 17,108 18,424 18,928 29,939 31,772 33,124 34,216 36,848 55,601 59,878 63,544 66,248 68,432 111,202 119,756 127,088 132,496 222,404 239,512 389,207 444,808 479,024 778,414 889,616 1,556,828 3,113,656 and 6,227,312, with no remainder.
Since 6,227,312 cannot be divided by just 1 and 6,227,312, it is not a prime number.