The number 7,231,392 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 16 17 18 21 24 28 32 34 36 42 48 51 56 63 68 72 84 96 102 112 119 126 136 144 153 168 204 211 224 238 252 272 288 306 336 357 408 422 476 504 544 612 633 672 714 816 844 952 1,008 1,071 1,224 1,266 1,428 1,477 1,632 1,688 1,899 1,904 2,016 2,142 2,448 2,532 2,856 2,954 3,376 3,587 3,798 3,808 4,284 4,431 4,896 5,064 5,712 5,908 6,752 7,174 7,596 8,568 8,862 10,128 10,761 11,424 11,816 13,293 14,348 15,192 17,136 17,724 20,256 21,522 23,632 25,109 26,586 28,696 30,384 32,283 34,272 35,448 43,044 47,264 50,218 53,172 57,392 60,768 64,566 70,896 75,327 86,088 100,436 106,344 114,784 129,132 141,792 150,654 172,176 200,872 212,688 225,981 258,264 301,308 344,352 401,744 425,376 451,962 516,528 602,616 803,488 903,924 1,033,056 1,205,232 1,807,848 2,410,464 3,615,696 and 7,231,392, with no remainder.
Since 7,231,392 cannot be divided by just 1 and 7,231,392, it is a composite number.