312143320051 has 4 divisors (see below), whose sum is σ = 312387756192. Its totient is φ = 311898883912.

The previous prime is 312143320037. The next prime is 312143320063. The reversal of 312143320051 is 150023341213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312143320051 - 2²⁷ = 312009102323 is a prime.

It is a super-2 number, since 2×312143320051² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312143319998 and 312143320025.

It is not an unprimeable number, because it can be changed into a prime (312143320091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122216155 + ... + 122218708.

It is an arithmetic number, because the mean of its divisors is an integer number (78096939048).

Almost surely, 2^312143320051 is an apocalyptic number.

312143320051 is a deficient number, since it is larger than the sum of its proper divisors (244436141).

312143320051 is a wasteful number, since it uses less digits than its factorization.

312143320051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244436140.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 312143320051 its reverse (150023341213), we get a palindrome (462166661264).

The spelling of 312143320051 in words is "three hundred twelve billion, one hundred forty-three million, three hundred twenty thousand, fifty-one".