22156412227 has 4 divisors (see below), whose sum is σ = 22157368000. Its totient is φ = 22155456456.

The previous prime is 22156412219. The next prime is 22156412323. The reversal of 22156412227 is 72221465122.

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

It is a cyclic number.

It is not a de Polignac number, because 22156412227 - 2³ = 22156412219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22156412192 and 22156412201.

It is not an unprimeable number, because it can be changed into a prime (22156412027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442227 + ... + 489772.

It is an arithmetic number, because the mean of its divisors is an integer number (5539342000).

Almost surely, 2^22156412227 is an apocalyptic number.

22156412227 is a deficient number, since it is larger than the sum of its proper divisors (955773).

22156412227 is an equidigital number, since it uses as much as digits as its factorization.

22156412227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955772.

The product of its digits is 26880, while the sum is 34.

Adding to 22156412227 its reverse (72221465122), we get a palindrome (94377877349).

The spelling of 22156412227 in words is "twenty-two billion, one hundred fifty-six million, four hundred twelve thousand, two hundred twenty-seven".