22156223523 has 12 divisors (see below), whose sum is σ = 34364755080. Its totient is φ = 12660699072.

The previous prime is 22156223521. The next prime is 22156223549. The reversal of 22156223523 is 32532265122.

It is not a de Polignac number, because 22156223523 - 2¹ = 22156223521 is a prime.

It is a super-3 number, since 3×22156223523³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (22156223521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75361158 + ... + 75361451.

It is an arithmetic number, because the mean of its divisors is an integer number (2863729590).

Almost surely, 2^22156223523 is an apocalyptic number.

22156223523 is a deficient number, since it is larger than the sum of its proper divisors (12208531557).

22156223523 is a wasteful number, since it uses less digits than its factorization.

22156223523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150722626 (or 150722619 counting only the distinct ones).

The product of its digits is 43200, while the sum is 33.

Adding to 22156223523 its reverse (32532265122), we get a palindrome (54688488645).

The spelling of 22156223523 in words is "twenty-two billion, one hundred fifty-six million, two hundred twenty-three thousand, five hundred twenty-three".