Divisor 21695

To determine if any number is divisible by 21695, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 5 and 4339 - then it is divisible by 21695.

The following tests must pass:

• Test if a number is divisible by 5
• The "Rob Seymour Test" for Divisibility by 4339

Easy!