A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5525580 can be evenly divided by 1 2 3 4 5 6 10 12 15 19 20 30 37 38 57 60 74 76 95 111 114 131 148 185 190 222 228 262 285 370 380 393 444 524 555 570 655 703 740 786 1,110 1,140 1,310 1,406 1,572 1,965 2,109 2,220 2,489 2,620 2,812 3,515 3,930 4,218 4,847 4,978 7,030 7,467 7,860 8,436 9,694 9,956 10,545 12,445 14,060 14,541 14,934 19,388 21,090 24,235 24,890 29,082 29,868 37,335 42,180 48,470 49,780 58,164 72,705 74,670 92,093 96,940 145,410 149,340 184,186 276,279 290,820 368,372 460,465 552,558 920,930 1,105,116 1,381,395 1,841,860 2,762,790 and 5,525,580, with no remainder.
Since 5,525,580 cannot be divided by just 1 and 5,525,580, it is not a prime number.