Divisor 15697

To determine if any number is divisible by 15697, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 11 and 1427 - then it is divisible by 15697.

The following tests must pass:

• Test if a number is divisible by 11
• The "lundf Test" for Divisibility by 1427

Easy!