231204113 has 4 divisors (see below), whose sum is σ = 264233280. Its totient is φ = 198174948.

The previous prime is 231204109. The next prime is 231204133. The reversal of 231204113 is 311402132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231204113 - 2² = 231204109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231204091 and 231204100.

It is not an unprimeable number, because it can be changed into a prime (231204133) 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, 16514573 + ... + 16514586.

It is an arithmetic number, because the mean of its divisors is an integer number (66058320).

Almost surely, 2^231204113 is an apocalyptic number.

It is an amenable number.

231204113 is a deficient number, since it is larger than the sum of its proper divisors (33029167).

231204113 is an equidigital number, since it uses as much as digits as its factorization.

231204113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33029166.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231204113 is about 15205.3974956263. The cubic root of 231204113 is about 613.7599115432.

Adding to 231204113 its reverse (311402132), we get a palindrome (542606245).

The spelling of 231204113 in words is "two hundred thirty-one million, two hundred four thousand, one hundred thirteen".