13231312304 has 80 divisors (see below), whose sum is σ = 30805885440. Its totient is φ = 5382474240.

The previous prime is 13231312271. The next prime is 13231312307. The reversal of 13231312304 is 40321313231.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 13231312304.

It is not an unprimeable number, because it can be changed into a prime (13231312307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317852 + ... + 357060.

It is an arithmetic number, because the mean of its divisors is an integer number (385073568).

Almost surely, 2^13231312304 is an apocalyptic number.

13231312304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13231312304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15402942720).

13231312304 is an abundant number, since it is smaller than the sum of its proper divisors (17574573136).

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

13231312304 is a wasteful number, since it uses less digits than its factorization.

13231312304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39378 (or 39372 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 13231312304 its reverse (40321313231), we get a palindrome (53552625535).

The spelling of 13231312304 in words is "thirteen billion, two hundred thirty-one million, three hundred twelve thousand, three hundred four".