55075520 has 56 divisors (see below), whose sum is σ = 132435600. Its totient is φ = 21814272.

The previous prime is 55075513. The next prime is 55075523. The reversal of 55075520 is 2557055.

It is not an unprimeable number, because it can be changed into a prime (55075523) 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, 34091 + ... + 35669.

Almost surely, 2^55075520 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 55075520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66217800).

55075520 is an abundant number, since it is smaller than the sum of its proper divisors (77360080).

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

55075520 is a wasteful number, since it uses less digits than its factorization.

55075520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705 (or 1695 counting only the distinct ones).

The product of its (nonzero) digits is 8750, while the sum is 29.

The square root of 55075520 is about 7421.2882978631. The cubic root of 55075520 is about 380.4692264518.

The spelling of 55075520 in words is "fifty-five million, seventy-five thousand, five hundred twenty".