55575128 has 32 divisors (see below), whose sum is σ = 119712000. Its totient is φ = 23693472.

The previous prime is 55575101. The next prime is 55575139. The reversal of 55575128 is 82157555.

It is a junction number, because it is equal to n+sod(n) for n = 55575091 and 55575100.

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, 8651 + ... + 13637.

It is an arithmetic number, because the mean of its divisors is an integer number (3741000).

Almost surely, 2^55575128 is an apocalyptic number.

It is an amenable number.

55575128 is an abundant number, since it is smaller than the sum of its proper divisors (64136872).

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

55575128 is a wasteful number, since it uses less digits than its factorization.

55575128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5199 (or 5195 counting only the distinct ones).

The product of its digits is 70000, while the sum is 38.

The square root of 55575128 is about 7454.8727688674. The cubic root of 55575128 is about 381.6162186351.

The spelling of 55575128 in words is "fifty-five million, five hundred seventy-five thousand, one hundred twenty-eight".