55222642 has 4 divisors (see below), whose sum is σ = 82833966. Its totient is φ = 27611320.

The previous prime is 55222637. The next prime is 55222649. The reversal of 55222642 is 24622255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46526041 + 8696601 = 6821^2 + 2949^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55222642.

It is not an unprimeable number, because it can be changed into a prime (55222649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13805659 + ... + 13805662.

Almost surely, 2^55222642 is an apocalyptic number.

55222642 is a deficient number, since it is larger than the sum of its proper divisors (27611324).

55222642 is a wasteful number, since it uses less digits than its factorization.

55222642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27611323.

The product of its digits is 9600, while the sum is 28.

The square root of 55222642 is about 7431.1938475591. The cubic root of 55222642 is about 380.8077048746.

Adding to 55222642 its reverse (24622255), we get a palindrome (79844897).

The spelling of 55222642 in words is "fifty-five million, two hundred twenty-two thousand, six hundred forty-two".