22156111522 has 4 divisors (see below), whose sum is σ = 33234167286. Its totient is φ = 11078055760.

The previous prime is 22156111513. The next prime is 22156111529. The reversal of 22156111522 is 22511165122.

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., 11776373361 + 10379738161 = 108519^2 + 101881^2 .

It is not an unprimeable number, because it can be changed into a prime (22156111529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5539027879 + ... + 5539027882.

Almost surely, 2^22156111522 is an apocalyptic number.

22156111522 is a deficient number, since it is larger than the sum of its proper divisors (11078055764).

22156111522 is a wasteful number, since it uses less digits than its factorization.

22156111522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11078055763.

The product of its digits is 2400, while the sum is 28.

Adding to 22156111522 its reverse (22511165122), we get a palindrome (44667276644).

The spelling of 22156111522 in words is "twenty-two billion, one hundred fifty-six million, one hundred eleven thousand, five hundred twenty-two".