55560520 has 64 divisors (see below), whose sum is σ = 130507200. Its totient is φ = 21262080.

The previous prime is 55560511. The next prime is 55560521. The reversal of 55560520 is 2506555.

55560520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55560521) 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 15 ways as a sum of consecutive naturals, for example, 244647 + ... + 244873.

It is an arithmetic number, because the mean of its divisors is an integer number (2039175).

Almost surely, 2^55560520 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 55560520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65253600).

55560520 is an abundant number, since it is smaller than the sum of its proper divisors (74946680).

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

55560520 is a wasteful number, since it uses less digits than its factorization.

55560520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 55560520 is about 7453.8929426173. The cubic root of 55560520 is about 381.5827795864.

It can be divided in two parts, 555 and 60520, that added together give a triangular number (61075 = T₃₄₉).

The spelling of 55560520 in words is "fifty-five million, five hundred sixty thousand, five hundred twenty".