55525320 has 96 divisors (see below), whose sum is σ = 182590200. Its totient is φ = 14631936.

The previous prime is 55525303. The next prime is 55525331. The reversal of 55525320 is 2352555.

It can be written as a sum of positive squares in 4 ways, for example, as 34786404 + 20738916 = 5898^2 + 4554^2 .

It is a super-2 number, since 2×55525320² = 6166122322204800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31174 + ... + 32906.

Almost surely, 2^55525320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55525320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91295100).

55525320 is an abundant number, since it is smaller than the sum of its proper divisors (127064880).

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

55525320 is a wasteful number, since it uses less digits than its factorization.

55525320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839 (or 1832 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 55525320 is about 7451.5313862320. The cubic root of 55525320 is about 381.5021794807.

Adding to 55525320 its reverse (2352555), we get a palindrome (57877875).

The spelling of 55525320 in words is "fifty-five million, five hundred twenty-five thousand, three hundred twenty".