55921180 has 48 divisors (see below), whose sum is σ = 141281280. Its totient is φ = 18163008.

The previous prime is 55921169. The next prime is 55921183. The reversal of 55921180 is 8112955.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55921183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7852 + ... + 13171.

It is an arithmetic number, because the mean of its divisors is an integer number (2943360).

Almost surely, 2^55921180 is an apocalyptic number.

It is an amenable number.

55921180 is an abundant number, since it is smaller than the sum of its proper divisors (85360100).

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

55921180 is a wasteful number, since it uses less digits than its factorization.

55921180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21058 (or 21056 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 55921180 is about 7478.0465363623. The cubic root of 55921180 is about 382.4066555654.

The spelling of 55921180 in words is "fifty-five million, nine hundred twenty-one thousand, one hundred eighty".