55222188 has 48 divisors (see below), whose sum is σ = 155925504. Its totient is φ = 14849280.

The previous prime is 55222187. The next prime is 55222199. The reversal of 55222188 is 88122255.

It is not an unprimeable number, because it can be changed into a prime (55222183) 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, 17908 + ... + 20763.

It is an arithmetic number, because the mean of its divisors is an integer number (3248448).

Almost surely, 2^55222188 is an apocalyptic number.

It is an amenable number.

55222188 is an abundant number, since it is smaller than the sum of its proper divisors (100703316).

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

55222188 is a wasteful number, since it uses less digits than its factorization.

55222188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38702 (or 38700 counting only the distinct ones).

The product of its digits is 12800, while the sum is 33.

The square root of 55222188 is about 7431.1633005876. The cubic root of 55222188 is about 380.8066612980.

The spelling of 55222188 in words is "fifty-five million, two hundred twenty-two thousand, one hundred eighty-eight".