231312311 has 8 divisors (see below), whose sum is σ = 243860064. Its totient is φ = 218972160.

The previous prime is 231312281. The next prime is 231312317. The reversal of 231312311 is 113213132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231312311 - 2⁶ = 231312247 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 231312311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312317) 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 7 ways as a sum of consecutive naturals, for example, 49610 + ... + 54071.

It is an arithmetic number, because the mean of its divisors is an integer number (30482508).

Almost surely, 2^231312311 is an apocalyptic number.

231312311 is a deficient number, since it is larger than the sum of its proper divisors (12547753).

231312311 is a wasteful number, since it uses less digits than its factorization.

231312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103801.

The product of its digits is 108, while the sum is 17.

The square root of 231312311 is about 15208.9549608117. The cubic root of 231312311 is about 613.8556382695.

Adding to 231312311 its reverse (113213132), we get a palindrome (344525443).

The spelling of 231312311 in words is "two hundred thirty-one million, three hundred twelve thousand, three hundred eleven".