231023412 has 72 divisors (see below), whose sum is σ = 603019872. Its totient is φ = 74520000.

The previous prime is 231023411. The next prime is 231023417. The reversal of 231023412 is 214320132.

231023412 is a `hidden beast` number, since 231 + 0 + 23 + 412 = 666.

231023412 is digitally balanced in base 3, because in such base 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 (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231023411) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 333987 + ... + 334677.

It is an arithmetic number, because the mean of its divisors is an integer number (8375276).

Almost surely, 2^231023412 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 231023412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301509936).

231023412 is an abundant number, since it is smaller than the sum of its proper divisors (371996460).

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

231023412 is a wasteful number, since it uses less digits than its factorization.

231023412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231023412 is about 15199.4543323107. The cubic root of 231023412 is about 613.5999721509.

Adding to 231023412 its reverse (214320132), we get a palindrome (445343544).

The spelling of 231023412 in words is "two hundred thirty-one million, twenty-three thousand, four hundred twelve".