Divisor 21171

To determine if any number is divisible by 21171, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 7057 - then it is divisible by 21171.

The following tests must pass:

• Test if a number is divisible by 3
• The "Lisa Vitolo Test" for Divisibility by 7057

Easy!