31243430444 has 12 divisors (see below), whose sum is σ = 57553687800. Its totient is φ = 14799519648.

The previous prime is 31243430417. The next prime is 31243430447. The reversal of 31243430444 is 44403434213.

It is a self number, because there is not a number n which added to its sum of digits gives 31243430444.

It is not an unprimeable number, because it can be changed into a prime (31243430447) 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, 205548809 + ... + 205548960.

It is an arithmetic number, because the mean of its divisors is an integer number (4796140650).

Almost surely, 2^31243430444 is an apocalyptic number.

It is an amenable number.

31243430444 is a deficient number, since it is larger than the sum of its proper divisors (26310257356).

31243430444 is a wasteful number, since it uses less digits than its factorization.

31243430444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411097792 (or 411097790 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 31243430444 its reverse (44403434213), we get a palindrome (75646864657).

The spelling of 31243430444 in words is "thirty-one billion, two hundred forty-three million, four hundred thirty thousand, four hundred forty-four".