825550 has 48 divisors (see below), whose sum is σ = 1785600. Its totient is φ = 280800.

The previous prime is 825547. The next prime is 825551. The reversal of 825550 is 55528.

825550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10411 + ... + 10489.

It is an arithmetic number, because the mean of its divisors is an integer number (37200).

2⁸²⁵⁵⁵⁰ is an apocalyptic number.

825550 is an abundant number, since it is smaller than the sum of its proper divisors (960050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825550 is a wasteful number, since it uses less digits than its factorization.

825550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 825550 is about 908.5978208206. The cubic root of 825550 is about 93.8097101102.

The spelling of 825550 in words is "eight hundred twenty-five thousand, five hundred fifty".