316131163385 has 4 divisors (see below), whose sum is σ = 379357396068. Its totient is φ = 252904930704.

The previous prime is 316131163259. The next prime is 316131163451. The reversal of 316131163385 is 583361131613.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51959834809 + 264171328576 = 227947^2 + 513976^2 .

It is a cyclic number.

It is not a de Polignac number, because 316131163385 - 2⁸ = 316131163129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31613116334 + ... + 31613116343.

It is an arithmetic number, because the mean of its divisors is an integer number (94839349017).

Almost surely, 2^316131163385 is an apocalyptic number.

It is an amenable number.

316131163385 is a deficient number, since it is larger than the sum of its proper divisors (63226232683).

316131163385 is an equidigital number, since it uses as much as digits as its factorization.

316131163385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63226232682.

The product of its digits is 116640, while the sum is 41.

Adding to 316131163385 its reverse (583361131613), we get a palindrome (899492294998).

The spelling of 316131163385 in words is "three hundred sixteen billion, one hundred thirty-one million, one hundred sixty-three thousand, three hundred eighty-five".