311612216113 has 4 divisors (see below), whose sum is σ = 339940599408. Its totient is φ = 283283832820.

The previous prime is 311612216077. The next prime is 311612216147.

311612216113 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 a de Polignac number, because none of the positive numbers 2^k-311612216113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311612216413) 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, 14164191631 + ... + 14164191652.

It is an arithmetic number, because the mean of its divisors is an integer number (84985149852).

Almost surely, 2^311612216113 is an apocalyptic number.

It is an amenable number.

311612216113 is a deficient number, since it is larger than the sum of its proper divisors (28328383295).

311612216113 is a wasteful number, since it uses less digits than its factorization.

311612216113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28328383294.

The product of its digits is 1296, while the sum is 28.

It can be divided in two parts, 311612 and 216113, that added together give a palindrome (527725).

The spelling of 311612216113 in words is "three hundred eleven billion, six hundred twelve million, two hundred sixteen thousand, one hundred thirteen".