231331412 has 24 divisors (see below), whose sum is σ = 436501800. Its totient is φ = 106638336.

The previous prime is 231331409. The next prime is 231331421. The reversal of 231331412 is 214133132.

It can be written as a sum of positive squares in 4 ways, for example, as 5550736 + 225780676 = 2356^2 + 15026^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50264 + ... + 54672.

It is an arithmetic number, because the mean of its divisors is an integer number (18187575).

Almost surely, 2^231331412 is an apocalyptic number.

It is an amenable number.

231331412 is a deficient number, since it is larger than the sum of its proper divisors (205170388).

231331412 is a wasteful number, since it uses less digits than its factorization.

231331412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5435 (or 5433 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 231331412 is about 15209.5829002639. The cubic root of 231331412 is about 613.8725345223.

Adding to 231331412 its reverse (214133132), we get a palindrome (445464544).

The spelling of 231331412 in words is "two hundred thirty-one million, three hundred thirty-one thousand, four hundred twelve".