Subtracting from 2550 its product of nonzero digits (50), we obtain a square (2500 = 502).
2550 is nontrivially palindromic in base 4 and base 9.
2550 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.
It is an Ulam number.
2550 is an undulating number in base 13.
It is a Curzon number.
It is a nialpdrome in base 15.
It is a congruent number.
22550 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3348).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2550 is a wasteful number, since it uses less digits than its factorization.
2550 is an evil number, because the sum of its binary digits is even.
The square root of 2550 is about 50.4975246918. The cubic root of 2550 is about 13.6619720805.
The spelling of 2550 in words is "two thousand, five hundred fifty".