55388191 has 8 divisors (see below), whose sum is σ = 55836000. Its totient is φ = 54942720.

The previous prime is 55388189. The next prime is 55388219. The reversal of 55388191 is 19188355.

55388191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55388191 - 2¹ = 55388189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55388101) 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, 123135 + ... + 123583.

It is an arithmetic number, because the mean of its divisors is an integer number (6979500).

Almost surely, 2^55388191 is an apocalyptic number.

55388191 is a deficient number, since it is larger than the sum of its proper divisors (447809).

55388191 is a wasteful number, since it uses less digits than its factorization.

55388191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169.

The product of its digits is 43200, while the sum is 40.

The square root of 55388191 is about 7442.3243009157. The cubic root of 55388191 is about 381.1878595846.

The spelling of 55388191 in words is "fifty-five million, three hundred eighty-eight thousand, one hundred ninety-one".