312223322231 has 4 divisors (see below), whose sum is σ = 312293473464. Its totient is φ = 312153171000.

The previous prime is 312223322183. The next prime is 312223322267. The reversal of 312223322231 is 132223322213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132223322213 = 11971 ⋅11045303.

It is a cyclic number.

It is not a de Polignac number, because 312223322231 - 2⁶ = 312223322167 is a prime.

It is a super-2 number, since 2×312223322231² (a number of 24 digits) contains 22 as substring.

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 312223322231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312223327231) 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, 35068940 + ... + 35077841.

It is an arithmetic number, because the mean of its divisors is an integer number (78073368366).

Almost surely, 2^312223322231 is an apocalyptic number.

312223322231 is a deficient number, since it is larger than the sum of its proper divisors (70151233).

312223322231 is an equidigital number, since it uses as much as digits as its factorization.

312223322231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70151232.

The product of its digits is 5184, while the sum is 26.

Adding to 312223322231 its reverse (132223322213), we get a palindrome (444446644444).

The spelling of 312223322231 in words is "three hundred twelve billion, two hundred twenty-three million, three hundred twenty-two thousand, two hundred thirty-one".