19
composite. 57 divided by 3 is 19. (Any number in which all the digits add up to equal a number divisible by 3 is divisible by 3. 5+7=12 which is divisible by 3.) And since 57 is divisible by more numbers than just 1 and itself it is a composite number.57 is a composite number since it can be divided by 3.57/3 = 19Composite.
19
57
19
3
Multiple is a number that is divided by another number without a remainder. Lets divide 57 by 6 we have 3 as remainder. So 57 is not a multiple of 6.
1, 3, 19, 57.
57
8
57 can be divided by: 1 3 19 and 57.
57 can be divided by: 1, 3, 19, 57.