313111312 has 20 divisors (see below), whose sum is σ = 612662796. Its totient is φ = 155004800.

The previous prime is 313111307. The next prime is 313111313. The reversal of 313111312 is 213111313.

It can be written as a sum of positive squares in 2 ways, for example, as 217149696 + 95961616 = 14736^2 + 9796^2 .

It is a super-2 number, since 2×313111312² = 196077387404722688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (313111313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95263 + ... + 98494.

Almost surely, 2^313111312 is an apocalyptic number.

It is an amenable number.

313111312 is a deficient number, since it is larger than the sum of its proper divisors (299551484).

313111312 is a wasteful number, since it uses less digits than its factorization.

313111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193866 (or 193860 counting only the distinct ones).

The product of its digits is 54, while the sum is 16.

The square root of 313111312 is about 17694.9515964300. The cubic root of 313111312 is about 679.0466108758.

Adding to 313111312 its reverse (213111313), we get a palindrome (526222625).

Subtracting from 313111312 its reverse (213111313), we obtain a palindrome (99999999).

It can be divided in two parts, 31311 and 1312, that added together give a palindrome (32623).

The spelling of 313111312 in words is "three hundred thirteen million, one hundred eleven thousand, three hundred twelve".