55618222 has 32 divisors (see below), whose sum is σ = 94004064. Its totient is φ = 24460800.

The previous prime is 55618193. The next prime is 55618229. The reversal of 55618222 is 22281655.

55618222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55618229) 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, 177538 + ... + 177850.

It is an arithmetic number, because the mean of its divisors is an integer number (2937627).

Almost surely, 2^55618222 is an apocalyptic number.

55618222 is a deficient number, since it is larger than the sum of its proper divisors (38385842).

55618222 is a wasteful number, since it uses less digits than its factorization.

55618222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its digits is 9600, while the sum is 31.

The square root of 55618222 is about 7457.7625330926. The cubic root of 55618222 is about 381.7148306165.

Adding to 55618222 its reverse (22281655), we get a palindrome (77899877).

It can be divided in two parts, 556182 and 22, that multiplied together give a square (12236004 = 3498²).

The spelling of 55618222 in words is "fifty-five million, six hundred eighteen thousand, two hundred twenty-two".