55138185 has 16 divisors (see below), whose sum is σ = 98023680. Its totient is φ = 29406960.

The previous prime is 55138183. The next prime is 55138189. The reversal of 55138185 is 58183155.

55138185 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55138185 - 2¹ = 55138183 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55138183) 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 15 ways as a sum of consecutive naturals, for example, 204081 + ... + 204350.

It is an arithmetic number, because the mean of its divisors is an integer number (6126480).

Almost surely, 2^55138185 is an apocalyptic number.

It is an amenable number.

55138185 is a deficient number, since it is larger than the sum of its proper divisors (42885495).

55138185 is a wasteful number, since it uses less digits than its factorization.

55138185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408445 (or 408439 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 55138185 is about 7425.5090734575. The cubic root of 55138185 is about 380.6134712226.

The spelling of 55138185 in words is "fifty-five million, one hundred thirty-eight thousand, one hundred eighty-five".