55872621 has 12 divisors (see below), whose sum is σ = 92234272. Its totient is φ = 31927176.

The previous prime is 55872617. The next prime is 55872623. The reversal of 55872621 is 12627855.

It is a happy number.

55872621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55872621 - 2² = 55872617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55872623) 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 11 ways as a sum of consecutive naturals, for example, 443371 + ... + 443496.

Almost surely, 2^55872621 is an apocalyptic number.

It is an amenable number.

55872621 is a deficient number, since it is larger than the sum of its proper divisors (36361651).

55872621 is a wasteful number, since it uses less digits than its factorization.

55872621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886880 (or 886877 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 55872621 is about 7474.7990608444. The cubic root of 55872621 is about 382.2959362622.

The spelling of 55872621 in words is "fifty-five million, eight hundred seventy-two thousand, six hundred twenty-one".