315263217774221 has 16 divisors (see below), whose sum is σ = 324182332782000. Its totient is φ = 306402869184000.

The previous prime is 315263217774209. The next prime is 315263217774227. The reversal of 315263217774221 is 122477712362513.

It can be written as a sum of positive squares in 8 ways, for example, as 89143999392100 + 226119218382121 = 9441610^2 + 15037261^2 .

It is a cyclic number.

It is not a de Polignac number, because 315263217774221 - 2⁶ = 315263217774157 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 (315263217774227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121680371 + ... + 124244271.

It is an arithmetic number, because the mean of its divisors is an integer number (20261395798875).

Almost surely, 2^{315263217774221} is an apocalyptic number.

It is an amenable number.

315263217774221 is a deficient number, since it is larger than the sum of its proper divisors (8919115007779).

315263217774221 is a wasteful number, since it uses less digits than its factorization.

315263217774221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575360.

The product of its digits is 5927040, while the sum is 53.

The spelling of 315263217774221 in words is "three hundred fifteen trillion, two hundred sixty-three billion, two hundred seventeen million, seven hundred seventy-four thousand, two hundred twenty-one".