231320112 has 20 divisors (see below), whose sum is σ = 597577080. Its totient is φ = 77106688.

The previous prime is 231320107. The next prime is 231320123. The reversal of 231320112 is 211023132.

It is a junction number, because it is equal to n+sod(n) for n = 231320091 and 231320100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2409537 + ... + 2409632.

It is an arithmetic number, because the mean of its divisors is an integer number (29878854).

Almost surely, 2^231320112 is an apocalyptic number.

It is an amenable number.

231320112 is an abundant number, since it is smaller than the sum of its proper divisors (366256968).

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

231320112 is a wasteful number, since it uses less digits than its factorization.

231320112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4819180 (or 4819174 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231320112 is about 15209.2114193998. The cubic root of 231320112 is about 613.8625389456.

Adding to 231320112 its reverse (211023132), we get a palindrome (442343244).

The spelling of 231320112 in words is "two hundred thirty-one million, three hundred twenty thousand, one hundred twelve".