231321412 has 12 divisors (see below), whose sum is σ = 462642880. Its totient is φ = 99137736.

The previous prime is 231321407. The next prime is 231321443. The reversal of 231321412 is 214123132.

It is a happy number.

231321412 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 231321412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4130712 + ... + 4130767.

Almost surely, 2^231321412 is an apocalyptic number.

It is an amenable number.

231321412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

231321412 is a wasteful number, since it uses less digits than its factorization.

231321412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8261490 (or 8261488 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 231321412 is about 15209.2541565982. The cubic root of 231321412 is about 613.8636888958.

Adding to 231321412 its reverse (214123132), we get a palindrome (445444544).

The spelling of 231321412 in words is "two hundred thirty-one million, three hundred twenty-one thousand, four hundred twelve".