231323123 has 2 divisors, whose sum is σ = 231323124. Its totient is φ = 231323122.

The previous prime is 231323093. The next prime is 231323137. The reversal of 231323123 is 321323132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231323123 - 2¹⁸ = 231060979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231323095 and 231323104.

It is not a weakly prime, because it can be changed into another prime (231323623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115661561 + 115661562.

It is an arithmetic number, because the mean of its divisors is an integer number (115661562).

Almost surely, 2^231323123 is an apocalyptic number.

231323123 is a deficient number, since it is larger than the sum of its proper divisors (1).

231323123 is an equidigital number, since it uses as much as digits as its factorization.

231323123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 20.

The square root of 231323123 is about 15209.3104051433. The cubic root of 231323123 is about 613.8652024005.

Adding to 231323123 its reverse (321323132), we get a palindrome (552646255).

Subtracting 231323123 from its reverse (321323132), we obtain a palindrome (90000009).

The spelling of 231323123 in words is "two hundred thirty-one million, three hundred twenty-three thousand, one hundred twenty-three".