31223432442 has 16 divisors (see below), whose sum is σ = 62902683072. Its totient is φ = 10331841120.

The previous prime is 31223432441. The next prime is 31223432519. The reversal of 31223432442 is 24423432213.

It is not an unprimeable number, because it can be changed into a prime (31223432441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18991534 + ... + 18993177.

It is an arithmetic number, because the mean of its divisors is an integer number (3931417692).

Almost surely, 2^31223432442 is an apocalyptic number.

31223432442 is an abundant number, since it is smaller than the sum of its proper divisors (31679250630).

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

31223432442 is a wasteful number, since it uses less digits than its factorization.

31223432442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37984853.

The product of its digits is 27648, while the sum is 30.

Adding to 31223432442 its reverse (24423432213), we get a palindrome (55646864655).

The spelling of 31223432442 in words is "thirty-one billion, two hundred twenty-three million, four hundred thirty-two thousand, four hundred forty-two".