231444012 has 24 divisors (see below), whose sum is σ = 558658800. Its totient is φ = 74487616.

The previous prime is 231443981. The next prime is 231444019. The reversal of 231444012 is 210444132.

It is a super-2 number, since 2×231444012² = 107132661381312288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231444012.

It is not an unprimeable number, because it can be changed into a prime (231444019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332187 + ... + 332882.

It is an arithmetic number, because the mean of its divisors is an integer number (23277450).

Almost surely, 2^231444012 is an apocalyptic number.

It is an amenable number.

231444012 is an abundant number, since it is smaller than the sum of its proper divisors (327214788).

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

231444012 is a wasteful number, since it uses less digits than its factorization.

231444012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665105 (or 665103 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 231444012 is about 15213.2840636070. The cubic root of 231444012 is about 613.9721186857.

Adding to 231444012 its reverse (210444132), we get a palindrome (441888144).

The spelling of 231444012 in words is "two hundred thirty-one million, four hundred forty-four thousand, twelve".