312232213331 has 4 divisors (see below), whose sum is σ = 312233359872. Its totient is φ = 312231066792.

The previous prime is 312232213231. The next prime is 312232213357. The reversal of 312232213331 is 133312232213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 312232213331 - 2²⁶ = 312165104467 is a prime.

It is a super-5 number, since 5×312232213331⁵ (a number of 59 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

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 312232213331.

It is not an unprimeable number, because it can be changed into a prime (312232213231) 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, 94505 + ... + 795861.

It is an arithmetic number, because the mean of its divisors is an integer number (78058339968).

Almost surely, 2^312232213331 is an apocalyptic number.

312232213331 is a deficient number, since it is larger than the sum of its proper divisors (1146541).

312232213331 is an equidigital number, since it uses as much as digits as its factorization.

312232213331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146540.

The product of its digits is 3888, while the sum is 26.

Adding to 312232213331 its reverse (133312232213), we get a palindrome (445544445544).

The spelling of 312232213331 in words is "three hundred twelve billion, two hundred thirty-two million, two hundred thirteen thousand, three hundred thirty-one".