312022313231 has 4 divisors (see below), whose sum is σ = 312858834552. Its totient is φ = 311185791912.

The previous prime is 312022313201. The next prime is 312022313237. The reversal of 312022313231 is 132313220213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132313220213 = 103 ⋅1284594371.

It is a cyclic number.

It is not a de Polignac number, because 312022313231 - 2¹⁰ = 312022312207 is a prime.

It is a super-2 number, since 2×312022313231² (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 = 312022313197 and 312022313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312022313237) 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, 418260101 + ... + 418260846.

It is an arithmetic number, because the mean of its divisors is an integer number (78214708638).

Almost surely, 2^312022313231 is an apocalyptic number.

312022313231 is a deficient number, since it is larger than the sum of its proper divisors (836521321).

312022313231 is an equidigital number, since it uses as much as digits as its factorization.

312022313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836521320.

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

Adding to 312022313231 its reverse (132313220213), we get a palindrome (444335533444).

The spelling of 312022313231 in words is "three hundred twelve billion, twenty-two million, three hundred thirteen thousand, two hundred thirty-one".