31513100312 has 32 divisors (see below), whose sum is σ = 60647616000. Its totient is φ = 15343773984.

The previous prime is 31513100309. The next prime is 31513100317. The reversal of 31513100312 is 21300131513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31513100317) 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, 135758 + ... + 285405.

It is an arithmetic number, because the mean of its divisors is an integer number (1895238000).

Almost surely, 2^31513100312 is an apocalyptic number.

It is an amenable number.

31513100312 is a deficient number, since it is larger than the sum of its proper divisors (29134515688).

31513100312 is a wasteful number, since it uses less digits than its factorization.

31513100312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421415 (or 421411 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

Adding to 31513100312 its reverse (21300131513), we get a palindrome (52813231825).

The spelling of 31513100312 in words is "thirty-one billion, five hundred thirteen million, one hundred thousand, three hundred twelve".