31284447312 has 40 divisors (see below), whose sum is σ = 82143051040. Its totient is φ = 10257194880.

The previous prime is 31284447301. The next prime is 31284447317. The reversal of 31284447312 is 21374448213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31284447317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5339362 + ... + 5345217.

It is an arithmetic number, because the mean of its divisors is an integer number (2053576276).

Almost surely, 2^31284447312 is an apocalyptic number.

It is an amenable number.

31284447312 is an abundant number, since it is smaller than the sum of its proper divisors (50858603728).

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

31284447312 is a wasteful number, since it uses less digits than its factorization.

31284447312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10684651 (or 10684645 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

Subtracting from 31284447312 its reverse (21374448213), we obtain a palindrome (9909999099).

The spelling of 31284447312 in words is "thirty-one billion, two hundred eighty-four million, four hundred forty-seven thousand, three hundred twelve".