231310243 has 2 divisors, whose sum is σ = 231310244. Its totient is φ = 231310242.

The previous prime is 231310229. The next prime is 231310291. The reversal of 231310243 is 342013132.

231310243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231310243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231310243.

It is not a weakly prime, because it can be changed into another prime (231310213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655121 + 115655122.

It is an arithmetic number, because the mean of its divisors is an integer number (115655122).

Almost surely, 2^231310243 is an apocalyptic number.

231310243 is a deficient number, since it is larger than the sum of its proper divisors (1).

231310243 is an equidigital number, since it uses as much as digits as its factorization.

231310243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 231310243 is about 15208.8869743976. The cubic root of 231310243 is about 613.8538089142.

Adding to 231310243 its reverse (342013132), we get a palindrome (573323375).

The spelling of 231310243 in words is "two hundred thirty-one million, three hundred ten thousand, two hundred forty-three".