31223044443 has 4 divisors (see below), whose sum is σ = 41630725928. Its totient is φ = 20815362960.

The previous prime is 31223044427. The next prime is 31223044477. The reversal of 31223044443 is 34444032213.

It is a happy number.

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

It is not a de Polignac number, because 31223044443 - 2⁴ = 31223044427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31223044443.

It is not an unprimeable number, because it can be changed into a prime (31223044483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5203840738 + ... + 5203840743.

It is an arithmetic number, because the mean of its divisors is an integer number (10407681482).

Almost surely, 2^31223044443 is an apocalyptic number.

31223044443 is a deficient number, since it is larger than the sum of its proper divisors (10407681485).

31223044443 is a wasteful number, since it uses less digits than its factorization.

31223044443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10407681484.

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

Adding to 31223044443 its reverse (34444032213), we get a palindrome (65667076656).

The spelling of 31223044443 in words is "thirty-one billion, two hundred twenty-three million, forty-four thousand, four hundred forty-three".