55004520 has 128 divisors (see below), whose sum is σ = 178070400. Its totient is φ = 13541376.

The previous prime is 55004507. The next prime is 55004531. The reversal of 55004520 is 2540055.

55004520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 120132 + ... + 120588.

It is an arithmetic number, because the mean of its divisors is an integer number (1391175).

Almost surely, 2^55004520 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 55004520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89035200).

55004520 is an abundant number, since it is smaller than the sum of its proper divisors (123065880).

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

55004520 is a wasteful number, since it uses less digits than its factorization.

55004520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 55004520 is about 7416.5032191728. The cubic root of 55004520 is about 380.3056635757.

Adding to 55004520 its reverse (2540055), we get a palindrome (57544575).

The spelling of 55004520 in words is "fifty-five million, four thousand, five hundred twenty".