231304205 has 24 divisors (see below), whose sum is σ = 313368216. Its totient is φ = 163658880.

The previous prime is 231304189. The next prime is 231304207. The reversal of 231304205 is 502403132.

It is a happy number.

231304205 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 4 ways, for example, as 89908324 + 141395881 = 9482^2 + 11891^2 .

It is not a de Polignac number, because 231304205 - 2⁴ = 231304189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231304207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17219 + ... + 27551.

It is an arithmetic number, because the mean of its divisors is an integer number (13057009).

Almost surely, 2^231304205 is an apocalyptic number.

It is an amenable number.

231304205 is a deficient number, since it is larger than the sum of its proper divisors (82064011).

231304205 is a wasteful number, since it uses less digits than its factorization.

231304205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10397 (or 10386 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 231304205 is about 15208.6884707393. The cubic root of 231304205 is about 613.8484676295.

Adding to 231304205 its reverse (502403132), we get a palindrome (733707337).

The spelling of 231304205 in words is "two hundred thirty-one million, three hundred four thousand, two hundred five".