What to do with numbers?

I have wrote an excel sheet where you write a number and then it appears if:
-it's composed or prime
-it's perfect square
-it's a perfect cube

What else can i do with this number (the number is between 1 and 65536)

You could say what integer sequences it belongs to: Fibonacci, triangular, pentagonal, ... .

See http://www.research.att.com/~njas/sequences/.

Thanks!
I'll use your sugestions!

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