55685901 has 4 divisors (see below), whose sum is σ = 74247872. Its totient is φ = 37123932.

The previous prime is 55685891. The next prime is 55685909. The reversal of 55685901 is 10958655.

55685901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55685901 - 2⁵ = 55685869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55685901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55685909) 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 3 ways as a sum of consecutive naturals, for example, 9280981 + ... + 9280986.

It is an arithmetic number, because the mean of its divisors is an integer number (18561968).

Almost surely, 2^55685901 is an apocalyptic number.

It is an amenable number.

55685901 is a deficient number, since it is larger than the sum of its proper divisors (18561971).

55685901 is a wasteful number, since it uses less digits than its factorization.

55685901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18561970.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 55685901 is about 7462.2986404995. The cubic root of 55685901 is about 381.8695976781.

The spelling of 55685901 in words is "fifty-five million, six hundred eighty-five thousand, nine hundred one".