231223423 has 2 divisors, whose sum is σ = 231223424. Its totient is φ = 231223422.

The previous prime is 231223403. The next prime is 231223463. The reversal of 231223423 is 324322132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231223423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231223394 and 231223403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231223403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115611711 + 115611712.

It is an arithmetic number, because the mean of its divisors is an integer number (115611712).

Almost surely, 2^231223423 is an apocalyptic number.

231223423 is a deficient number, since it is larger than the sum of its proper divisors (1).

231223423 is an equidigital number, since it uses as much as digits as its factorization.

231223423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 22.

The square root of 231223423 is about 15206.0324542597. The cubic root of 231223423 is about 613.7769979952.

Adding to 231223423 its reverse (324322132), we get a palindrome (555545555).

The spelling of 231223423 in words is "two hundred thirty-one million, two hundred twenty-three thousand, four hundred twenty-three".