231204144321 has 12 divisors (see below), whose sum is σ = 335015052372. Its totient is φ = 153649860576.

The previous prime is 231204144317. The next prime is 231204144331. The reversal of 231204144321 is 123441402132.

231204144321 is a `hidden beast` number, since 23 + 1 + 204 + 1 + 4 + 432 + 1 = 666.

231204144321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 59323422096 + 171880722225 = 243564^2 + 414585^2 .

It is not a de Polignac number, because 231204144321 - 2² = 231204144317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231204144331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40516626 + ... + 40522331.

It is an arithmetic number, because the mean of its divisors is an integer number (27917921031).

Almost surely, 2^231204144321 is an apocalyptic number.

It is an amenable number.

231204144321 is a deficient number, since it is larger than the sum of its proper divisors (103810908051).

231204144321 is a wasteful number, since it uses less digits than its factorization.

231204144321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81039280 (or 81039277 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 231204144321 its reverse (123441402132), we get a palindrome (354645546453).

The spelling of 231204144321 in words is "two hundred thirty-one billion, two hundred four million, one hundred forty-four thousand, three hundred twenty-one".