55885121 has 4 divisors (see below), whose sum is σ = 55906500. Its totient is φ = 55863744.

The previous prime is 55885111. The next prime is 55885127. The reversal of 55885121 is 12158855.

55885121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 15689521 + 40195600 = 3961^2 + 6340^2 .

It is a cyclic number.

It is not a de Polignac number, because 55885121 - 2⁶ = 55885057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55885127) 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, 6116 + ... + 12213.

It is an arithmetic number, because the mean of its divisors is an integer number (13976625).

Almost surely, 2^55885121 is an apocalyptic number.

It is an amenable number.

55885121 is a deficient number, since it is larger than the sum of its proper divisors (21379).

55885121 is a wasteful number, since it uses less digits than its factorization.

55885121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21378.

The product of its digits is 16000, while the sum is 35.

The square root of 55885121 is about 7475.6351569616. The cubic root of 55885121 is about 382.3244436229.

The spelling of 55885121 in words is "fifty-five million, eight hundred eighty-five thousand, one hundred twenty-one".