231323211312 has 40 divisors (see below), whose sum is σ = 607381445040. Its totient is φ = 75843674880.

The previous prime is 231323211293. The next prime is 231323211323. The reversal of 231323211312 is 213112323132.

231323211312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231323211312² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39498987 + ... + 39504842.

It is an arithmetic number, because the mean of its divisors is an integer number (15184536126).

Almost surely, 2^231323211312 is an apocalyptic number.

It is an amenable number.

231323211312 is an abundant number, since it is smaller than the sum of its proper divisors (376058233728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231323211312 is a wasteful number, since it uses less digits than its factorization.

231323211312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79003901 (or 79003895 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 231323211312 its reverse (213112323132), we get a palindrome (444435534444).

The spelling of 231323211312 in words is "two hundred thirty-one billion, three hundred twenty-three million, two hundred eleven thousand, three hundred twelve".