55485520 has 20 divisors (see below), whose sum is σ = 129004020. Its totient is φ = 22194176.

The previous prime is 55485517. The next prime is 55485557. The reversal of 55485520 is 2558455.

It can be written as a sum of positive squares in 2 ways, for example, as 33131536 + 22353984 = 5756^2 + 4728^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346705 + ... + 346864.

It is an arithmetic number, because the mean of its divisors is an integer number (6450201).

Almost surely, 2^55485520 is an apocalyptic number.

It is an amenable number.

55485520 is an abundant number, since it is smaller than the sum of its proper divisors (73518500).

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

55485520 is a wasteful number, since it uses less digits than its factorization.

55485520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693582 (or 693576 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The square root of 55485520 is about 7448.8603155114. The cubic root of 55485520 is about 381.4110053638.

The spelling of 55485520 in words is "fifty-five million, four hundred eighty-five thousand, five hundred twenty".