Plenty:
259=3²+5²+15²= 3²+9²+13² so, it can be expressed as the sum of three distinct squares in two different ways.
It can be expressed as the sum of four cubes in two different ways. 259=2³+2³+3³+6³=1³+2³+5³+
It is semi-prime in that it is a number that is the product of two distinct primes: 7×37.
I have had another busy day and this is the best I could do when it came to writing this evening…
