22231220442 has 16 divisors (see below), whose sum is σ = 44468460000. Its totient is φ = 7409403632.

The previous prime is 22231220419. The next prime is 22231220443. The reversal of 22231220442 is 24402213222.

It is not an unprimeable number, because it can be changed into a prime (22231220443) 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, 202053 + ... + 292040.

It is an arithmetic number, because the mean of its divisors is an integer number (2779278750).

Almost surely, 2^22231220442 is an apocalyptic number.

22231220442 is an abundant number, since it is smaller than the sum of its proper divisors (22237239558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22231220442 is a wasteful number, since it uses less digits than its factorization.

22231220442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501597.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 22231220442 its reverse (24402213222), we get a palindrome (46633433664).

The spelling of 22231220442 in words is "twenty-two billion, two hundred thirty-one million, two hundred twenty thousand, four hundred forty-two".