55222042 has 4 divisors (see below), whose sum is σ = 82833066. Its totient is φ = 27611020.

The previous prime is 55222009. The next prime is 55222043. The reversal of 55222042 is 24022255.

It is a happy number.

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., 49126081 + 6095961 = 7009^2 + 2469^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55222043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13805509 + ... + 13805512.

Almost surely, 2^55222042 is an apocalyptic number.

55222042 is a deficient number, since it is larger than the sum of its proper divisors (27611024).

55222042 is a wasteful number, since it uses less digits than its factorization.

55222042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27611023.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 55222042 is about 7431.1534770855. The cubic root of 55222042 is about 380.8063256973.

Adding to 55222042 its reverse (24022255), we get a palindrome (79244297).

The spelling of 55222042 in words is "fifty-five million, two hundred twenty-two thousand, forty-two".