55506520 has 32 divisors (see below), whose sum is σ = 125193600. Its totient is φ = 22148608.

The previous prime is 55506487. The next prime is 55506569. The reversal of 55506520 is 2560555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17712 + ... + 20608.

It is an arithmetic number, because the mean of its divisors is an integer number (3912300).

Almost surely, 2^55506520 is an apocalyptic number.

It is an amenable number.

55506520 is an abundant number, since it is smaller than the sum of its proper divisors (69687080).

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

55506520 is a wasteful number, since it uses less digits than its factorization.

55506520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387 (or 3383 counting only the distinct ones).

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

The square root of 55506520 is about 7450.2697937726. The cubic root of 55506520 is about 381.4591177412.

The spelling of 55506520 in words is "fifty-five million, five hundred six thousand, five hundred twenty".