55223889 has 16 divisors (see below), whose sum is σ = 84264960. Its totient is φ = 31513680.

The previous prime is 55223887. The next prime is 55223921. The reversal of 55223889 is 98832255.

It is not a de Polignac number, because 55223889 - 2¹ = 55223887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55223889.

It is not an unprimeable number, because it can be changed into a prime (55223881) 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, 20554 + ... + 23084.

It is an arithmetic number, because the mean of its divisors is an integer number (5266560).

Almost surely, 2^55223889 is an apocalyptic number.

It is an amenable number.

55223889 is a deficient number, since it is larger than the sum of its proper divisors (29041071).

55223889 is a wasteful number, since it uses less digits than its factorization.

55223889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580.

The product of its digits is 172800, while the sum is 42.

The square root of 55223889 is about 7431.2777501584. The cubic root of 55223889 is about 380.8105712329.

The spelling of 55223889 in words is "fifty-five million, two hundred twenty-three thousand, eight hundred eighty-nine".