231243023 has 4 divisors (see below), whose sum is σ = 252265128. Its totient is φ = 210220920.

The previous prime is 231243017. The next prime is 231243059. The reversal of 231243023 is 320342132.

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

It is a cyclic number.

It is not a de Polignac number, because 231243023 - 2¹² = 231238927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231242986 and 231243004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231243223) 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, 10511036 + ... + 10511057.

It is an arithmetic number, because the mean of its divisors is an integer number (63066282).

Almost surely, 2^231243023 is an apocalyptic number.

231243023 is a deficient number, since it is larger than the sum of its proper divisors (21022105).

231243023 is a wasteful number, since it uses less digits than its factorization.

231243023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21022104.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 231243023 is about 15206.6769216683. The cubic root of 231243023 is about 613.7943400809.

Adding to 231243023 its reverse (320342132), we get a palindrome (551585155).

The spelling of 231243023 in words is "two hundred thirty-one million, two hundred forty-three thousand, twenty-three".