231240412 has 48 divisors (see below), whose sum is σ = 469490560. Its totient is φ = 98739648.

The previous prime is 231240389. The next prime is 231240419. The reversal of 231240412 is 214042132.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 231240412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231240419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39763 + ... + 45205.

Almost surely, 2^231240412 is an apocalyptic number.

It is an amenable number.

231240412 is an abundant number, since it is smaller than the sum of its proper divisors (238250148).

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

231240412 is a wasteful number, since it uses less digits than its factorization.

231240412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522 (or 5520 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 231240412 is about 15206.5910709797. The cubic root of 231240412 is about 613.7920299240.

Adding to 231240412 its reverse (214042132), we get a palindrome (445282544).

It can be divided in two parts, 2312 and 40412, that added together give a palindrome (42724).

The spelling of 231240412 in words is "two hundred thirty-one million, two hundred forty thousand, four hundred twelve".