22511220422 has 64 divisors (see below), whose sum is σ = 36615490560. Its totient is φ = 10353619584.

The previous prime is 22511220421. The next prime is 22511220427. The reversal of 22511220422 is 22402211522.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22511220421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56703128 + ... + 56703524.

It is an arithmetic number, because the mean of its divisors is an integer number (572117040).

Almost surely, 2^22511220422 is an apocalyptic number.

22511220422 is a deficient number, since it is larger than the sum of its proper divisors (14104270138).

22511220422 is a wasteful number, since it uses less digits than its factorization.

22511220422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 22511220422 its reverse (22402211522), we get a palindrome (44913431944).

The spelling of 22511220422 in words is "twenty-two billion, five hundred eleven million, two hundred twenty thousand, four hundred twenty-two".