55217892 has 24 divisors (see below), whose sum is σ = 129151456. Its totient is φ = 18361728.

The previous prime is 55217881. The next prime is 55217893. The reversal of 55217892 is 29871255.

55217892 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55217892.

It is not an unprimeable number, because it can be changed into a prime (55217893) 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 7 ways as a sum of consecutive naturals, for example, 118 + ... + 10509.

Almost surely, 2^55217892 is an apocalyptic number.

It is an amenable number.

55217892 is an abundant number, since it is smaller than the sum of its proper divisors (73933564).

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

55217892 is a wasteful number, since it uses less digits than its factorization.

55217892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11067 (or 11065 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 55217892 is about 7430.8742419718. The cubic root of 55217892 is about 380.7967861138.

The spelling of 55217892 in words is "fifty-five million, two hundred seventeen thousand, eight hundred ninety-two".