What are some straightforward-ish things you can do to integers to produce another integer, and has at least 2 parameters?
I've got add/subtract/multiply by n; remainder when dividing by n; digit sum; gcd with n; lcm with n.
Not interested in square root - only one param!
In reply to @christianp
one avenue I'm particularly interested in: what can you do with the base-10 digits of an integer?