13031330312 has 128 divisors (see below), whose sum is σ = 32993049600. Its totient is φ = 4659897600.

The previous prime is 13031330303. The next prime is 13031330341. The reversal of 13031330312 is 21303313031.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1428887 + ... + 1437977.

It is an arithmetic number, because the mean of its divisors is an integer number (257758200).

Almost surely, 2^13031330312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13031330312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16496524800).

13031330312 is an abundant number, since it is smaller than the sum of its proper divisors (19961719288).

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

13031330312 is a wasteful number, since it uses less digits than its factorization.

13031330312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9307 (or 9303 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 13031330312 its reverse (21303313031), we get a palindrome (34334643343).

It can be divided in two parts, 13031 and 330312, that added together give a palindrome (343343).

The spelling of 13031330312 in words is "thirteen billion, thirty-one million, three hundred thirty thousand, three hundred twelve".