A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5322672 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 27 36 37 48 54 72 74 81 108 111 144 148 162 216 222 243 296 324 333 432 444 486 592 648 666 888 972 999 1,296 1,332 1,369 1,776 1,944 1,998 2,664 2,738 2,997 3,888 3,996 4,107 5,328 5,476 5,994 7,992 8,214 8,991 10,952 11,988 12,321 15,984 16,428 17,982 21,904 23,976 24,642 32,856 35,964 36,963 47,952 49,284 65,712 71,928 73,926 98,568 110,889 143,856 147,852 197,136 221,778 295,704 332,667 443,556 591,408 665,334 887,112 1,330,668 1,774,224 2,661,336 and 5,322,672, with no remainder.
Since 5,322,672 cannot be divided by just 1 and 5,322,672, it is not a prime number.