55075580 has 96 divisors (see below), whose sum is σ = 142321536. Its totient is φ = 17473536.

The previous prime is 55075571. The next prime is 55075583. The reversal of 55075580 is 8557055.

55075580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 55075580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55075583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173582 + ... + 173898.

It is an arithmetic number, because the mean of its divisors is an integer number (1482516).

Almost surely, 2^55075580 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 55075580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71160768).

55075580 is an abundant number, since it is smaller than the sum of its proper divisors (87245956).

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

55075580 is a wasteful number, since it uses less digits than its factorization.

55075580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 35.

The square root of 55075580 is about 7421.2923402868. The cubic root of 55075580 is about 380.4693646145.

It can be divided in two parts, 55075 and 580, that added together give a palindrome (55655).

The spelling of 55075580 in words is "fifty-five million, seventy-five thousand, five hundred eighty".