Divisor 21443

To determine if any number is divisible by 21443, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 41 and 523 - then it is divisible by 21443.

The following tests must pass:

• Test if a number is divisible by 41
• Test if a number is divisible by 523

Easy!