A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1631112 can be evenly divided by 1 2 3 4 6 7 8 12 14 19 21 24 28 38 42 49 56 57 73 76 84 98 114 133 146 147 152 168 196 219 228 266 292 294 392 399 438 456 511 532 584 588 798 876 931 1,022 1,064 1,176 1,387 1,533 1,596 1,752 1,862 2,044 2,774 2,793 3,066 3,192 3,577 3,724 4,088 4,161 5,548 5,586 6,132 7,154 7,448 8,322 9,709 10,731 11,096 11,172 12,264 14,308 16,644 19,418 21,462 22,344 28,616 29,127 33,288 38,836 42,924 58,254 67,963 77,672 85,848 116,508 135,926 203,889 233,016 271,852 407,778 543,704 815,556 and 1,631,112, with no remainder.
Since 1,631,112 cannot be divided by just 1 and 1,631,112, it is not a prime number.