55581684 has 48 divisors (see below), whose sum is σ = 132193152. Its totient is φ = 18173952.

The previous prime is 55581641. The next prime is 55581703. The reversal of 55581684 is 48618555.

55581684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 238432 + ... + 238664.

It is an arithmetic number, because the mean of its divisors is an integer number (2754024).

Almost surely, 2^55581684 is an apocalyptic number.

It is an amenable number.

55581684 is an abundant number, since it is smaller than the sum of its proper divisors (76611468).

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

55581684 is a wasteful number, since it uses less digits than its factorization.

55581684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 534 counting only the distinct ones).

The product of its digits is 192000, while the sum is 42.

The square root of 55581684 is about 7455.3124683007. The cubic root of 55581684 is about 381.6312240140.

It can be divided in two parts, 55581 and 684, that added together give a palindrome (56265).

The spelling of 55581684 in words is "fifty-five million, five hundred eighty-one thousand, six hundred eighty-four".