55522218 has 32 divisors (see below), whose sum is σ = 118117440. Its totient is φ = 17349120.

The previous prime is 55522189. The next prime is 55522223. The reversal of 55522218 is 81222555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8548 + ... + 13568.

It is an arithmetic number, because the mean of its divisors is an integer number (3691170).

Almost surely, 2^55522218 is an apocalyptic number.

55522218 is an abundant number, since it is smaller than the sum of its proper divisors (62595222).

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

55522218 is a wasteful number, since it uses less digits than its factorization.

55522218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5142.

The product of its digits is 8000, while the sum is 30.

The square root of 55522218 is about 7451.3232381907. The cubic root of 55522218 is about 381.4950749633.

The spelling of 55522218 in words is "fifty-five million, five hundred twenty-two thousand, two hundred eighteen".