312111132 has 48 divisors (see below), whose sum is σ = 750234912. Its totient is φ = 100915200.

The previous prime is 312111103. The next prime is 312111139. The reversal of 312111132 is 231111213.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111139) 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, 177168 + ... + 178920.

It is an arithmetic number, because the mean of its divisors is an integer number (15629894).

Almost surely, 2^312111132 is an apocalyptic number.

It is an amenable number.

312111132 is an abundant number, since it is smaller than the sum of its proper divisors (438123780).

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

312111132 is a wasteful number, since it uses less digits than its factorization.

312111132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198 (or 2196 counting only the distinct ones).

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

The square root of 312111132 is about 17666.6672578616. The cubic root of 312111132 is about 678.3228072722.

Adding to 312111132 its reverse (231111213), we get a palindrome (543222345).

The spelling of 312111132 in words is "three hundred twelve million, one hundred eleven thousand, one hundred thirty-two".