The set of integers consists of the counting numbers, their negations and zero. They are central to many areas of mathematics, such as number theory and combinatorics. Wolfram|Alpha has extensive knowledge relating to integers and provides faculties for doing computations with them.
Learn about the characteristics of specific integers: whether they are prime, whether they are triangular, etc.
Compute properties of an integer:
Do arithmetic with integers. Use exact arithmetic on arbitrarily large integers.