55522566 has 48 divisors (see below), whose sum is σ = 133415568. Its totient is φ = 16545600.

The previous prime is 55522531. The next prime is 55522603. The reversal of 55522566 is 66522555.

55522566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55522566.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 9780 + ... + 14376.

It is an arithmetic number, because the mean of its divisors is an integer number (2779491).

Almost surely, 2^55522566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55522566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66707784).

55522566 is an abundant number, since it is smaller than the sum of its proper divisors (77893002).

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

55522566 is a wasteful number, since it uses less digits than its factorization.

55522566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677 (or 4674 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 55522566 is about 7451.3465897112. The cubic root of 55522566 is about 381.4958720017.

It can be divided in two parts, 5552 and 2566, that added together give a palindrome (8118).

The spelling of 55522566 in words is "fifty-five million, five hundred twenty-two thousand, five hundred sixty-six".