22155444044 has 24 divisors (see below), whose sum is σ = 39822594000. Its totient is φ = 10778987520.

The previous prime is 22155444013. The next prime is 22155444049. The reversal of 22155444044 is 44044455122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22155443995 and 22155444013.

It is not an unprimeable number, because it can be changed into a prime (22155444049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116069 + ... + 240380.

It is an arithmetic number, because the mean of its divisors is an integer number (1659274750).

Almost surely, 2^22155444044 is an apocalyptic number.

It is an amenable number.

22155444044 is a deficient number, since it is larger than the sum of its proper divisors (17667149956).

22155444044 is a wasteful number, since it uses less digits than its factorization.

22155444044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356873 (or 356871 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 35.

Adding to 22155444044 its reverse (44044455122), we get a palindrome (66199899166).

The spelling of 22155444044 in words is "twenty-two billion, one hundred fifty-five million, four hundred forty-four thousand, forty-four".