315231312 has 80 divisors (see below), whose sum is σ = 917084160. Its totient is φ = 92438400.

The previous prime is 315231311. The next prime is 315231331. The reversal of 315231312 is 213132513.

315231312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315231311) 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, 6739 + ... + 25997.

It is an arithmetic number, because the mean of its divisors is an integer number (11463552).

Almost surely, 2^315231312 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 315231312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458542080).

315231312 is an abundant number, since it is smaller than the sum of its proper divisors (601852848).

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

315231312 is a wasteful number, since it uses less digits than its factorization.

315231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19312 (or 19306 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 315231312 is about 17754.7546308024. The cubic root of 315231312 is about 680.5757177403.

Adding to 315231312 its reverse (213132513), we get a palindrome (528363825).

The spelling of 315231312 in words is "three hundred fifteen million, two hundred thirty-one thousand, three hundred twelve".