315231322161 has 96 divisors (see below), whose sum is σ = 520945344000. Its totient is φ = 168577936128.

The previous prime is 315231322121. The next prime is 315231322177. The reversal of 315231322161 is 161223132513.

It is not a de Polignac number, because 315231322161 - 2¹⁸ = 315231060017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315231322121) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 122228770 + ... + 122231348.

It is an arithmetic number, because the mean of its divisors is an integer number (5426514000).

Almost surely, 2^315231322161 is an apocalyptic number.

It is an amenable number.

315231322161 is a deficient number, since it is larger than the sum of its proper divisors (205714021839).

315231322161 is a wasteful number, since it uses less digits than its factorization.

315231322161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131 (or 3124 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

Adding to 315231322161 its reverse (161223132513), we get a palindrome (476454454674).

The spelling of 315231322161 in words is "three hundred fifteen billion, two hundred thirty-one million, three hundred twenty-two thousand, one hundred sixty-one".