315681396527 has 4 divisors (see below), whose sum is σ = 360778738896. Its totient is φ = 270584054160.

The previous prime is 315681396497. The next prime is 315681396529. The reversal of 315681396527 is 725693186513.

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

It is not a de Polignac number, because 315681396527 - 2¹⁰ = 315681395503 is a prime.

It is a super-2 number, since 2×315681396527² (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 (315681396529) 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, 22548671174 + ... + 22548671187.

It is an arithmetic number, because the mean of its divisors is an integer number (90194684724).

Almost surely, 2^315681396527 is an apocalyptic number.

315681396527 is a deficient number, since it is larger than the sum of its proper divisors (45097342369).

315681396527 is an equidigital number, since it uses as much as digits as its factorization.

315681396527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45097342368.

The product of its digits is 8164800, while the sum is 56.

The spelling of 315681396527 in words is "three hundred fifteen billion, six hundred eighty-one million, three hundred ninety-six thousand, five hundred twenty-seven".