231243123 has 8 divisors (see below), whose sum is σ = 308563200. Its totient is φ = 154042568.

The previous prime is 231243113. The next prime is 231243139. The reversal of 231243123 is 321342132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231243123 - 2⁶ = 231243059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231243123.

It is not an unprimeable number, because it can be changed into a prime (231243113) 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 7 ways as a sum of consecutive naturals, for example, 25263 + ... + 33176.

It is an arithmetic number, because the mean of its divisors is an integer number (38570400).

Almost surely, 2^231243123 is an apocalyptic number.

231243123 is a deficient number, since it is larger than the sum of its proper divisors (77320077).

231243123 is a wasteful number, since it uses less digits than its factorization.

231243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59761.

The product of its digits is 864, while the sum is 21.

The square root of 231243123 is about 15206.6802096973. The cubic root of 231243123 is about 613.7944285585.

Adding to 231243123 its reverse (321342132), we get a palindrome (552585255).

Subtracting 231243123 from its reverse (321342132), we obtain a palindrome (90099009).

The spelling of 231243123 in words is "two hundred thirty-one million, two hundred forty-three thousand, one hundred twenty-three".