312644446213 has 4 divisors (see below), whose sum is σ = 341066668608. Its totient is φ = 284222223820.

The previous prime is 312644446201. The next prime is 312644446223.

312644446213 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312644446213 - 2²⁵ = 312610891781 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312644446223) 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, 14211111181 + ... + 14211111202.

It is an arithmetic number, because the mean of its divisors is an integer number (85266667152).

Almost surely, 2^312644446213 is an apocalyptic number.

It is an amenable number.

312644446213 is a deficient number, since it is larger than the sum of its proper divisors (28422222395).

312644446213 is a wasteful number, since it uses less digits than its factorization.

312644446213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28422222394.

The product of its digits is 331776, while the sum is 40.

It can be divided in two parts, 312644 and 446213, that added together give a palindrome (758857).

The spelling of 312644446213 in words is "three hundred twelve billion, six hundred forty-four million, four hundred forty-six thousand, two hundred thirteen".