231866112 has 72 divisors (see below), whose sum is σ = 637073920. Its totient is φ = 74787840.

The previous prime is 231866099. The next prime is 231866113. The reversal of 231866112 is 211668132.

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

It is a self number, because there is not a number n which added to its sum of digits gives 231866112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231866113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18939 + ... + 28677.

Almost surely, 2^231866112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231866112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318536960).

231866112 is an abundant number, since it is smaller than the sum of its proper divisors (405207808).

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

231866112 is an equidigital number, since it uses as much as digits as its factorization.

231866112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9789 (or 9775 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 231866112 is about 15227.1504885189. The cubic root of 231866112 is about 614.3451394158.

The spelling of 231866112 in words is "two hundred thirty-one million, eight hundred sixty-six thousand, one hundred twelve".