231223123 has 4 divisors (see below), whose sum is σ = 235013728. Its totient is φ = 227432520.

The previous prime is 231223121. The next prime is 231223133. The reversal of 231223123 is 321322132.

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 231223123 - 2¹ = 231223121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231223123.

It is not an unprimeable number, because it can be changed into a prime (231223121) 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, 1895211 + ... + 1895332.

It is an arithmetic number, because the mean of its divisors is an integer number (58753432).

Almost surely, 2^231223123 is an apocalyptic number.

231223123 is a deficient number, since it is larger than the sum of its proper divisors (3790605).

231223123 is an equidigital number, since it uses as much as digits as its factorization.

231223123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790604.

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

The square root of 231223123 is about 15206.0225897504. The cubic root of 231223123 is about 613.7767325475.

Adding to 231223123 its reverse (321322132), we get a palindrome (552545255).

Subtracting 231223123 from its reverse (321322132), we obtain a palindrome (90099009).

The spelling of 231223123 in words is "two hundred thirty-one million, two hundred twenty-three thousand, one hundred twenty-three".