312131115355313 has 4 divisors (see below), whose sum is σ = 322199861011968. Its totient is φ = 302062369698660.

The previous prime is 312131115355291. The next prime is 312131115355351. The reversal of 312131115355313 is 313553511131213.

It is a happy number.

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 312131115355313 - 2¹⁸ = 312131115093169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312131115355363) 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, 5034372828281 + ... + 5034372828342.

It is an arithmetic number, because the mean of its divisors is an integer number (80549965252992).

Almost surely, 2^{312131115355313} is an apocalyptic number.

It is an amenable number.

312131115355313 is a deficient number, since it is larger than the sum of its proper divisors (10068745656655).

312131115355313 is a wasteful number, since it uses less digits than its factorization.

312131115355313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10068745656654.

The product of its digits is 60750, while the sum is 38.

Adding to 312131115355313 its reverse (313553511131213), we get a palindrome (625684626486526).

The spelling of 312131115355313 in words is "three hundred twelve trillion, one hundred thirty-one billion, one hundred fifteen million, three hundred fifty-five thousand, three hundred thirteen".