A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 802230 can be evenly divided by 1 2 3 5 6 10 11 13 15 17 22 26 30 33 34 39 51 55 65 66 78 85 102 110 121 130 143 165 170 187 195 221 242 255 286 330 363 374 390 429 442 510 561 605 663 715 726 858 935 1,105 1,122 1,210 1,326 1,430 1,573 1,815 1,870 2,057 2,145 2,210 2,431 2,805 3,146 3,315 3,630 4,114 4,290 4,719 4,862 5,610 6,171 6,630 7,293 7,865 9,438 10,285 12,155 12,342 14,586 15,730 20,570 23,595 24,310 26,741 30,855 36,465 47,190 53,482 61,710 72,930 80,223 133,705 160,446 267,410 401,115 and 802,230, with no remainder.
Since 802,230 cannot be divided by just 1 and 802,230, it is not a prime number.