22155444243 has 10 divisors (see below), whose sum is σ = 33096404484. Its totient is φ = 14770296108.

The previous prime is 22155444221. The next prime is 22155444251. The reversal of 22155444243 is 34244455122.

22155444243 is a `hidden beast` number, since 2 + 21 + 554 + 4 + 42 + 43 = 666.

It is not a de Polignac number, because 22155444243 - 2⁵ = 22155444211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22155444198 and 22155444207.

It is not an unprimeable number, because it can be changed into a prime (22155444253) 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 9 ways as a sum of consecutive naturals, for example, 136761921 + ... + 136762082.

Almost surely, 2^22155444243 is an apocalyptic number.

22155444243 is a deficient number, since it is larger than the sum of its proper divisors (10940960241).

22155444243 is an equidigital number, since it uses as much as digits as its factorization.

22155444243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273524015 (or 273524006 counting only the distinct ones).

The product of its digits is 153600, while the sum is 36.

Adding to 22155444243 its reverse (34244455122), we get a palindrome (56399899365).

The spelling of 22155444243 in words is "twenty-two billion, one hundred fifty-five million, four hundred forty-four thousand, two hundred forty-three".