22155004444 has 6 divisors (see below), whose sum is σ = 38771257784. Its totient is φ = 11077502220.

The previous prime is 22155004381. The next prime is 22155004447. The reversal of 22155004444 is 44440055122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155004447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2769375552 + ... + 2769375559.

Almost surely, 2^22155004444 is an apocalyptic number.

It is an amenable number.

22155004444 is a deficient number, since it is larger than the sum of its proper divisors (16616253340).

22155004444 is a wasteful number, since it uses less digits than its factorization.

22155004444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5538751115 (or 5538751113 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

Adding to 22155004444 its reverse (44440055122), we get a palindrome (66595059566).

The spelling of 22155004444 in words is "twenty-two billion, one hundred fifty-five million, four thousand, four hundred forty-four".