231243223 has 2 divisors, whose sum is σ = 231243224. Its totient is φ = 231243222.

The previous prime is 231243211. The next prime is 231243263. The reversal of 231243223 is 322342132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231243223 - 2²⁵ = 197688791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231243194 and 231243203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231243263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115621611 + 115621612.

It is an arithmetic number, because the mean of its divisors is an integer number (115621612).

Almost surely, 2^231243223 is an apocalyptic number.

231243223 is a deficient number, since it is larger than the sum of its proper divisors (1).

231243223 is an equidigital number, since it uses as much as digits as its factorization.

231243223 is an evil number, because the sum of its binary digits is even.

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

The square root of 231243223 is about 15206.6834977256. The cubic root of 231243223 is about 613.7945170359.

Adding to 231243223 its reverse (322342132), we get a palindrome (553585355).

The spelling of 231243223 in words is "two hundred thirty-one million, two hundred forty-three thousand, two hundred twenty-three".