231312112 has 10 divisors (see below), whose sum is σ = 448167248. Its totient is φ = 115656048.

The previous prime is 231312083. The next prime is 231312113. The reversal of 231312112 is 211213132.

231312112 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 14457007 = 231312112 / (2 + 3 + 1 + 3 + 1 + 2 + 1 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7228488 + ... + 7228519.

Almost surely, 2^231312112 is an apocalyptic number.

It is an amenable number.

231312112 is a deficient number, since it is larger than the sum of its proper divisors (216855136).

231312112 is a wasteful number, since it uses less digits than its factorization.

231312112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14457015 (or 14457009 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 231312112 is about 15208.9484186120. The cubic root of 231312112 is about 613.8554622343.

Adding to 231312112 its reverse (211213132), we get a palindrome (442525244).

The spelling of 231312112 in words is "two hundred thirty-one million, three hundred twelve thousand, one hundred twelve".