315223440205 has 4 divisors (see below), whose sum is σ = 378268128252. Its totient is φ = 252178752160.

The previous prime is 315223440179. The next prime is 315223440211. The reversal of 315223440205 is 502044322513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502044322513 = 1601 ⋅313581713.

It can be written as a sum of positive squares in 2 ways, for example, as 145596428041 + 169627012164 = 381571^2 + 411858^2 .

It is not a de Polignac number, because 315223440205 - 2²⁹ = 314686569293 is a prime.

It is a Duffinian number.

It is a congruent 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, 31522344016 + ... + 31522344025.

It is an arithmetic number, because the mean of its divisors is an integer number (94567032063).

Almost surely, 2^315223440205 is an apocalyptic number.

It is an amenable number.

315223440205 is a deficient number, since it is larger than the sum of its proper divisors (63044688047).

315223440205 is an equidigital number, since it uses as much as digits as its factorization.

315223440205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63044688046.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 315223440205 its reverse (502044322513), we get a palindrome (817267762718).

The spelling of 315223440205 in words is "three hundred fifteen billion, two hundred twenty-three million, four hundred forty thousand, two hundred five".