55921116 has 12 divisors (see below), whose sum is σ = 130482632. Its totient is φ = 18640368.

The previous prime is 55921093. The next prime is 55921133. The reversal of 55921116 is 61112955.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2330035 + ... + 2330058.

Almost surely, 2^55921116 is an apocalyptic number.

It is an amenable number.

55921116 is an abundant number, since it is smaller than the sum of its proper divisors (74561516).

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

55921116 is a wasteful number, since it uses less digits than its factorization.

55921116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660100 (or 4660098 counting only the distinct ones).

The product of its digits is 2700, while the sum is 30.

The square root of 55921116 is about 7478.0422571687. The cubic root of 55921116 is about 382.4065096813.

The spelling of 55921116 in words is "fifty-five million, nine hundred twenty-one thousand, one hundred sixteen".