55228785 has 16 divisors (see below), whose sum is σ = 88724160. Its totient is φ = 29336000.

The previous prime is 55228783. The next prime is 55228829. The reversal of 55228785 is 58782255.

It is not a de Polignac number, because 55228785 - 2¹ = 55228783 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55228783) 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, 3570 + ... + 11099.

It is an arithmetic number, because the mean of its divisors is an integer number (5545260).

Almost surely, 2^55228785 is an apocalyptic number.

It is an amenable number.

55228785 is a deficient number, since it is larger than the sum of its proper divisors (33495375).

55228785 is a wasteful number, since it uses less digits than its factorization.

55228785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14928.

The product of its digits is 224000, while the sum is 42.

The square root of 55228785 is about 7431.6071613077. The cubic root of 55228785 is about 380.8218247773.

The spelling of 55228785 in words is "fifty-five million, two hundred twenty-eight thousand, seven hundred eighty-five".