312111312 has 40 divisors (see below), whose sum is σ = 807251904. Its totient is φ = 103912704.

The previous prime is 312111307. The next prime is 312111323. The reversal of 312111312 is 213111213.

It is a happy number.

It is a super-2 number, since 2×312111312² = 194826942156722688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 312111291 and 312111300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42333 + ... + 49155.

Almost surely, 2^312111312 is an apocalyptic number.

It is an amenable number.

312111312 is an abundant number, since it is smaller than the sum of its proper divisors (495140592).

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

312111312 is a wasteful number, since it uses less digits than its factorization.

312111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7787 (or 7781 counting only the distinct ones).

The product of its digits is 36, while the sum is 15.

The square root of 312111312 is about 17666.6723522003. The cubic root of 312111312 is about 678.3229376724.

Adding to 312111312 its reverse (213111213), we get a palindrome (525222525).

Subtracting from 312111312 its reverse (213111213), we obtain a palindrome (99000099).

It can be divided in two parts, 31211 and 1312, that added together give a palindrome (32523).

The spelling of 312111312 in words is "three hundred twelve million, one hundred eleven thousand, three hundred twelve".