231311723 has 2 divisors, whose sum is σ = 231311724. Its totient is φ = 231311722.

The previous prime is 231311699. The next prime is 231311761. The reversal of 231311723 is 327113132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231311723 - 2⁸ = 231311467 is a prime.

It is a super-2 number, since 2×231311723² = 107010226394457458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231311783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655861 + 115655862.

It is an arithmetic number, because the mean of its divisors is an integer number (115655862).

Almost surely, 2^231311723 is an apocalyptic number.

231311723 is a deficient number, since it is larger than the sum of its proper divisors (1).

231311723 is an equidigital number, since it uses as much as digits as its factorization.

231311723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 23.

The square root of 231311723 is about 15208.9356300827. The cubic root of 231311723 is about 613.8551181251.

Adding to 231311723 its reverse (327113132), we get a palindrome (558424855).

The spelling of 231311723 in words is "two hundred thirty-one million, three hundred eleven thousand, seven hundred twenty-three".