55397525 has 6 divisors (see below), whose sum is σ = 68692962. Its totient is φ = 44318000.

The previous prime is 55397513. The next prime is 55397539. The reversal of 55397525 is 52579355.

55397525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 14161 + 55383364 = 119^2 + 7442^2 .

It is not a de Polignac number, because 55397525 - 2¹⁴ = 55381141 is a prime.

It is a super-2 number, since 2×55397525² = 6137771552251250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1107926 + ... + 1107975.

It is an arithmetic number, because the mean of its divisors is an integer number (11448827).

Almost surely, 2^55397525 is an apocalyptic number.

It is an amenable number.

55397525 is a deficient number, since it is larger than the sum of its proper divisors (13295437).

55397525 is a wasteful number, since it uses less digits than its factorization.

55397525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215911 (or 2215906 counting only the distinct ones).

The product of its digits is 236250, while the sum is 41.

The square root of 55397525 is about 7442.9513635385. The cubic root of 55397525 is about 381.2092709335.

The spelling of 55397525 in words is "fifty-five million, three hundred ninety-seven thousand, five hundred twenty-five".