312661166213 has 4 divisors (see below), whose sum is σ = 341084908608. Its totient is φ = 284237423820.

The previous prime is 312661166197. The next prime is 312661166291.

312661166213 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 312661166213 - 2⁴ = 312661166197 is a prime.

It is a super-2 number, since 2×312661166213² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312661166113) 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, 14211871181 + ... + 14211871202.

It is an arithmetic number, because the mean of its divisors is an integer number (85271227152).

Almost surely, 2^312661166213 is an apocalyptic number.

It is an amenable number.

312661166213 is a deficient number, since it is larger than the sum of its proper divisors (28423742395).

312661166213 is a wasteful number, since it uses less digits than its factorization.

312661166213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28423742394.

The product of its digits is 46656, while the sum is 38.

It can be divided in two parts, 312661 and 166213, that added together give a palindrome (478874).

The spelling of 312661166213 in words is "three hundred twelve billion, six hundred sixty-one million, one hundred sixty-six thousand, two hundred thirteen".