22031142442 has 4 divisors (see below), whose sum is σ = 33046713666. Its totient is φ = 11015571220.

The previous prime is 22031142391. The next prime is 22031142473. The reversal of 22031142442 is 24424113022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22016327641 + 14814801 = 148379^2 + 3849^2 .

It is an unprimeable number.

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, 5507785609 + ... + 5507785612.

Almost surely, 2^22031142442 is an apocalyptic number.

22031142442 is a deficient number, since it is larger than the sum of its proper divisors (11015571224).

22031142442 is a wasteful number, since it uses less digits than its factorization.

22031142442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11015571223.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 22031142442 its reverse (24424113022), we get a palindrome (46455255464).

The spelling of 22031142442 in words is "twenty-two billion, thirty-one million, one hundred forty-two thousand, four hundred forty-two".