231311311 has 32 divisors (see below), whose sum is σ = 297676800. Its totient is φ = 178164000.

The previous prime is 231311287. The next prime is 231311357. The reversal of 231311311 is 113113132.

It is not a de Polignac number, because 231311311 - 2⁹ = 231310799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380770 + ... + 381376.

It is an arithmetic number, because the mean of its divisors is an integer number (9302400).

Almost surely, 2^231311311 is an apocalyptic number.

231311311 is a deficient number, since it is larger than the sum of its proper divisors (66365489).

231311311 is a wasteful number, since it uses less digits than its factorization.

231311311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 726 counting only the distinct ones).

The product of its digits is 54, while the sum is 16.

The square root of 231311311 is about 15208.9220854076. The cubic root of 231311311 is about 613.8547536696.

Adding to 231311311 its reverse (113113132), we get a palindrome (344424443).

It can be divided in two parts, 23131 and 1311, that added together give a palindrome (24442).

The spelling of 231311311 in words is "two hundred thirty-one million, three hundred eleven thousand, three hundred eleven".