55728525 has 12 divisors (see below), whose sum is σ = 92137952. Its totient is φ = 29721840.

The previous prime is 55728503. The next prime is 55728527. The reversal of 55728525 is 52582755.

55728525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55728525 - 2⁸ = 55728269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55728527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 371449 + ... + 371598.

Almost surely, 2^55728525 is an apocalyptic number.

It is an amenable number.

55728525 is a deficient number, since it is larger than the sum of its proper divisors (36409427).

55728525 is a wasteful number, since it uses less digits than its factorization.

55728525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743060 (or 743055 counting only the distinct ones).

The product of its digits is 140000, while the sum is 39.

The square root of 55728525 is about 7465.1540506543. The cubic root of 55728525 is about 381.9670050904.

The spelling of 55728525 in words is "fifty-five million, seven hundred twenty-eight thousand, five hundred twenty-five".