A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7271110 can be evenly divided by 1 2 5 7 10 11 14 19 22 35 38 49 55 70 71 77 95 98 110 133 142 154 190 209 245 266 355 385 418 490 497 539 665 710 770 781 931 994 1,045 1,078 1,330 1,349 1,463 1,562 1,862 2,090 2,485 2,695 2,698 2,926 3,479 3,905 4,655 4,970 5,390 5,467 6,745 6,958 7,315 7,810 9,310 9,443 10,241 10,934 13,490 14,630 14,839 17,395 18,886 20,482 27,335 29,678 34,790 38,269 47,215 51,205 54,670 66,101 74,195 76,538 94,430 102,410 103,873 132,202 148,390 191,345 207,746 330,505 382,690 519,365 661,010 727,111 1,038,730 1,454,222 3,635,555 and 7,271,110, with no remainder.
Since 7,271,110 cannot be divided by just 1 and 7,271,110, it is not a prime number.