Divisor 25231

To determine if any number is divisible by 25231, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 23 and 1097 - then it is divisible by 25231.

The following tests must pass:

• Test if a number is divisible by 23
• The "Martijn van der Ven Test" for Divisibility by 1097

Easy!