231312311231 has 8 divisors (see below), whose sum is σ = 246562671600. Its totient is φ = 216244590208.

The previous prime is 231312311221. The next prime is 231312311257. The reversal of 231312311231 is 132113213132.

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 231312311231 - 2¹⁴ = 231312294847 is a prime.

It is a super-2 number, since 2×231312311231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231312311197 and 231312311206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312311201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45657221 + ... + 45662286.

It is an arithmetic number, because the mean of its divisors is an integer number (30820333950).

Almost surely, 2^231312311231 is an apocalyptic number.

231312311231 is a deficient number, since it is larger than the sum of its proper divisors (15250360369).

231312311231 is a wasteful number, since it uses less digits than its factorization.

231312311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91319673.

The product of its digits is 648, while the sum is 23.

Adding to 231312311231 its reverse (132113213132), we get a palindrome (363425524363).

The spelling of 231312311231 in words is "two hundred thirty-one billion, three hundred twelve million, three hundred eleven thousand, two hundred thirty-one".