231344412 has 48 divisors (see below), whose sum is σ = 589542912. Its totient is φ = 70176960.

The previous prime is 231344401. The next prime is 231344431. The reversal of 231344412 is 214443132.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633 + ... + 21519.

It is an arithmetic number, because the mean of its divisors is an integer number (12282144).

Almost surely, 2^231344412 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 231344412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294771456).

231344412 is an abundant number, since it is smaller than the sum of its proper divisors (358198500).

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

231344412 is a wasteful number, since it uses less digits than its factorization.

231344412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20978 (or 20976 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 231344412 is about 15210.0102564068. The cubic root of 231344412 is about 613.8840334556.

Adding to 231344412 its reverse (214443132), we get a palindrome (445787544).

The spelling of 231344412 in words is "two hundred thirty-one million, three hundred forty-four thousand, four hundred twelve".