315136124322161 has 4 divisors (see below), whose sum is σ = 316443743095524. Its totient is φ = 313828505548800.

The previous prime is 315136124322133. The next prime is 315136124322179. The reversal of 315136124322161 is 161223421631513.

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 264991385445136 + 50144738877025 = 16278556^2 + 7081295^2 .

It is a cyclic number.

It is not a de Polignac number, because 315136124322161 - 2²⁶ = 315136057213297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315136124322121) 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, 653809386320 + ... + 653809386801.

It is an arithmetic number, because the mean of its divisors is an integer number (79110935773881).

Almost surely, 2^{315136124322161} is an apocalyptic number.

It is an amenable number.

315136124322161 is a deficient number, since it is larger than the sum of its proper divisors (1307618773363).

315136124322161 is a wasteful number, since it uses less digits than its factorization.

315136124322161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307618773362.

The product of its digits is 155520, while the sum is 41.

Adding to 315136124322161 its reverse (161223421631513), we get a palindrome (476359545953674).

The spelling of 315136124322161 in words is "three hundred fifteen trillion, one hundred thirty-six billion, one hundred twenty-four million, three hundred twenty-two thousand, one hundred sixty-one".