315994851831 has 4 divisors (see below), whose sum is σ = 421326469112. Its totient is φ = 210663234552.

The previous prime is 315994851779. The next prime is 315994851877. The reversal of 315994851831 is 138158499513.

315994851831 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138158499513 = 3 ⋅46052833171.

It is not a de Polignac number, because 315994851831 - 2¹⁰ = 315994850807 is a prime.

It is a super-2 number, since 2×315994851831² (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 (315994851881) 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, 52665808636 + ... + 52665808641.

It is an arithmetic number, because the mean of its divisors is an integer number (105331617278).

Almost surely, 2^315994851831 is an apocalyptic number.

315994851831 is a deficient number, since it is larger than the sum of its proper divisors (105331617281).

315994851831 is a wasteful number, since it uses less digits than its factorization.

315994851831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105331617280.

The product of its digits is 4665600, while the sum is 57.

The spelling of 315994851831 in words is "three hundred fifteen billion, nine hundred ninety-four million, eight hundred fifty-one thousand, eight hundred thirty-one".