231204243 has 4 divisors (see below), whose sum is σ = 308272328. Its totient is φ = 154136160.

The previous prime is 231204241. The next prime is 231204263. The reversal of 231204243 is 342402132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 231204243 - 2¹ = 231204241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231204241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38534038 + ... + 38534043.

It is an arithmetic number, because the mean of its divisors is an integer number (77068082).

Almost surely, 2^231204243 is an apocalyptic number.

231204243 is a deficient number, since it is larger than the sum of its proper divisors (77068085).

231204243 is an equidigital number, since it uses as much as digits as its factorization.

231204243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77068084.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 231204243 is about 15205.4017704236. The cubic root of 231204243 is about 613.7600265769.

Adding to 231204243 its reverse (342402132), we get a palindrome (573606375).

The spelling of 231204243 in words is "two hundred thirty-one million, two hundred four thousand, two hundred forty-three".