31244221432 has 16 divisors (see below), whose sum is σ = 58632038640. Its totient is φ = 15609011136.

The previous prime is 31244221331. The next prime is 31244221531. The reversal of 31244221432 is 23412244213.

It is a self number, because there is not a number n which added to its sum of digits gives 31244221432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1627308 + ... + 1646395.

It is an arithmetic number, because the mean of its divisors is an integer number (3664502415).

Almost surely, 2^31244221432 is an apocalyptic number.

It is an amenable number.

31244221432 is a deficient number, since it is larger than the sum of its proper divisors (27387817208).

31244221432 is a wasteful number, since it uses less digits than its factorization.

31244221432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274902 (or 3274898 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

Adding to 31244221432 its reverse (23412244213), we get a palindrome (54656465645).

The spelling of 31244221432 in words is "thirty-one billion, two hundred forty-four million, two hundred twenty-one thousand, four hundred thirty-two".