55475920 has 40 divisors (see below), whose sum is σ = 129685896. Its totient is φ = 22069248.

The previous prime is 55475843. The next prime is 55475923. The reversal of 55475920 is 2957455.

It can be written as a sum of positive squares in 4 ways, for example, as 478864 + 54997056 = 692^2 + 7416^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 55475920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55475923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13644 + ... + 17236.

Almost surely, 2^55475920 is an apocalyptic number.

It is an amenable number.

55475920 is an abundant number, since it is smaller than the sum of its proper divisors (74209976).

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

55475920 is a wasteful number, since it uses less digits than its factorization.

55475920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799 (or 3793 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 55475920 is about 7448.2158937560. The cubic root of 55475920 is about 381.3890070908.

The spelling of 55475920 in words is "fifty-five million, four hundred seventy-five thousand, nine hundred twenty".