55188366 has 16 divisors (see below), whose sum is σ = 111618000. Its totient is φ = 18189248.

The previous prime is 55188361. The next prime is 55188379. The reversal of 55188366 is 66388155.

55188366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55188361) 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 7 ways as a sum of consecutive naturals, for example, 51141 + ... + 52208.

It is an arithmetic number, because the mean of its divisors is an integer number (6976125).

Almost surely, 2^55188366 is an apocalyptic number.

55188366 is an abundant number, since it is smaller than the sum of its proper divisors (56429634).

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

55188366 is a wasteful number, since it uses less digits than its factorization.

55188366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103443.

The product of its digits is 172800, while the sum is 42.

The square root of 55188366 is about 7428.8872652639. The cubic root of 55188366 is about 380.7289010491.

The spelling of 55188366 in words is "fifty-five million, one hundred eighty-eight thousand, three hundred sixty-six".