55572228 has 36 divisors (see below), whose sum is σ = 141418368. Its totient is φ = 18399600.

The previous prime is 55572221. The next prime is 55572239. The reversal of 55572228 is 82227555.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55572192 and 55572201.

It is not an unprimeable number, because it can be changed into a prime (55572221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325 + ... + 10547.

It is an arithmetic number, because the mean of its divisors is an integer number (3928288).

Almost surely, 2^55572228 is an apocalyptic number.

It is an amenable number.

55572228 is an abundant number, since it is smaller than the sum of its proper divisors (85846140).

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

55572228 is a wasteful number, since it uses less digits than its factorization.

55572228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384 (or 10379 counting only the distinct ones).

The product of its digits is 56000, while the sum is 36.

The square root of 55572228 is about 7454.6782626751. The cubic root of 55572228 is about 381.6095807359.

The spelling of 55572228 in words is "fifty-five million, five hundred seventy-two thousand, two hundred twenty-eight".