55116920 has 16 divisors (see below), whose sum is σ = 124013160. Its totient is φ = 22046752.

The previous prime is 55116913. The next prime is 55116923. The reversal of 55116920 is 2961155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55116923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688922 + ... + 689001.

Almost surely, 2^55116920 is an apocalyptic number.

It is an amenable number.

55116920 is an abundant number, since it is smaller than the sum of its proper divisors (68896240).

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

55116920 is a wasteful number, since it uses less digits than its factorization.

55116920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377934 (or 1377930 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 55116920 is about 7424.0770470140. The cubic root of 55116920 is about 380.5645348627.

It can be divided in two parts, 551 and 16920, that added together give a palindrome (17471).

The spelling of 55116920 in words is "fifty-five million, one hundred sixteen thousand, nine hundred twenty".