55831725 has 18 divisors (see below), whose sum is σ = 100001226. Its totient is φ = 29776800.

The previous prime is 55831697. The next prime is 55831729. The reversal of 55831725 is 52713855.

55831725 is a `hidden beast` number, since 5 + 583 + 1 + 72 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2643876 + 53187849 = 1626^2 + 7293^2 .

It is not a de Polignac number, because 55831725 - 2⁸ = 55831469 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55831725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55831729) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 123846 + ... + 124295.

Almost surely, 2^55831725 is an apocalyptic number.

It is an amenable number.

55831725 is a deficient number, since it is larger than the sum of its proper divisors (44169501).

55831725 is a wasteful number, since it uses less digits than its factorization.

55831725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248157 (or 248149 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 55831725 is about 7472.0629681501. The cubic root of 55831725 is about 382.2026395788.

The spelling of 55831725 in words is "fifty-five million, eight hundred thirty-one thousand, seven hundred twenty-five".