315223312405 has 4 divisors (see below), whose sum is σ = 378267974892. Its totient is φ = 252178649920.

The previous prime is 315223312399. The next prime is 315223312409. The reversal of 315223312405 is 504213322513.

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 160763308209 + 154460004196 = 400953^2 + 393014^2 .

It is not a de Polignac number, because 315223312405 - 2¹¹ = 315223310357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315223312409) 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, 31522331236 + ... + 31522331245.

It is an arithmetic number, because the mean of its divisors is an integer number (94566993723).

Almost surely, 2^315223312405 is an apocalyptic number.

It is an amenable number.

315223312405 is a deficient number, since it is larger than the sum of its proper divisors (63044662487).

315223312405 is an equidigital number, since it uses as much as digits as its factorization.

315223312405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63044662486.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 315223312405 its reverse (504213322513), we get a palindrome (819436634918).

The spelling of 315223312405 in words is "three hundred fifteen billion, two hundred twenty-three million, three hundred twelve thousand, four hundred five".