5355 is divisble by 3 since 5+3+5+5=18 is divisible by 3 5355=3*1785 1785 is divisble by 3 since 1+7+8+5=21 is divisible by 3 1785=3*595 595 is not divisible by 3 but by 5 595=5*119 119 is divisible by 7 since 1*2+1*3+9*1=14 is divisible by 7. 119=7*17
