31504338312 has 32 divisors (see below), whose sum is σ = 79381017600. Its totient is φ = 10418756544.

The previous prime is 31504338293. The next prime is 31504338317. The reversal of 31504338312 is 21383340513.

It is not an unprimeable number, because it can be changed into a prime (31504338317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5164987 + ... + 5171082.

It is an arithmetic number, because the mean of its divisors is an integer number (2480656800).

Almost surely, 2^31504338312 is an apocalyptic number.

It is an amenable number.

31504338312 is an abundant number, since it is smaller than the sum of its proper divisors (47876679288).

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

31504338312 is a wasteful number, since it uses less digits than its factorization.

31504338312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10336205 (or 10336201 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 31504338312 its reverse (21383340513), we get a palindrome (52887678825).

The spelling of 31504338312 in words is "thirty-one billion, five hundred four million, three hundred thirty-eight thousand, three hundred twelve".