231322012 has 12 divisors (see below), whose sum is σ = 405092016. Its totient is φ = 115581440.

The previous prime is 231321997. The next prime is 231322019. The reversal of 231322012 is 210223132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231322019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13093 + ... + 25180.

It is an arithmetic number, because the mean of its divisors is an integer number (33757668).

Almost surely, 2^231322012 is an apocalyptic number.

It is an amenable number.

231322012 is a deficient number, since it is larger than the sum of its proper divisors (173770004).

231322012 is a wasteful number, since it uses less digits than its factorization.

231322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39788 (or 39786 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231322012 is about 15209.2738814185. The cubic root of 231322012 is about 613.8642196406.

Adding to 231322012 its reverse (210223132), we get a palindrome (441545144).

The spelling of 231322012 in words is "two hundred thirty-one million, three hundred twenty-two thousand, twelve".