55228505 has 16 divisors (see below), whose sum is σ = 67910400. Its totient is φ = 43105920.

The previous prime is 55228493. The next prime is 55228507. The reversal of 55228505 is 50582255.

55228505 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 55228505 - 2⁸ = 55228249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55228507) 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 15 ways as a sum of consecutive naturals, for example, 34370 + ... + 35940.

It is an arithmetic number, because the mean of its divisors is an integer number (4244400).

Almost surely, 2^55228505 is an apocalyptic number.

It is an amenable number.

55228505 is a deficient number, since it is larger than the sum of its proper divisors (12681895).

55228505 is a wasteful number, since it uses less digits than its factorization.

55228505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 55228505 is about 7431.5883228284. The cubic root of 55228505 is about 380.8211812102.

The spelling of 55228505 in words is "fifty-five million, two hundred twenty-eight thousand, five hundred five".