312032213231 has 4 divisors (see below), whose sum is σ = 312742993200. Its totient is φ = 311321433264.

The previous prime is 312032213221. The next prime is 312032213237. The reversal of 312032213231 is 132312230213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312032213231 is a prime.

It is a super-2 number, since 2×312032213231² (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 = 312032213197 and 312032213206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312032213237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355389326 + ... + 355390203.

It is an arithmetic number, because the mean of its divisors is an integer number (78185748300).

Almost surely, 2^312032213231 is an apocalyptic number.

312032213231 is a deficient number, since it is larger than the sum of its proper divisors (710779969).

312032213231 is an equidigital number, since it uses as much as digits as its factorization.

312032213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710779968.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 312032213231 its reverse (132312230213), we get a palindrome (444344443444).

The spelling of 312032213231 in words is "three hundred twelve billion, thirty-two million, two hundred thirteen thousand, two hundred thirty-one".