315528086221 has 8 divisors (see below), whose sum is σ = 323258859000. Its totient is φ = 307798978560.

The previous prime is 315528086183. The next prime is 315528086227. The reversal of 315528086221 is 122680825513.

It can be written as a sum of positive squares in 4 ways, for example, as 46737683721 + 268790402500 = 216189^2 + 518450^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 315528086221 - 2¹³ = 315528078029 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 (315528086227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28276 + ... + 794893.

It is an arithmetic number, because the mean of its divisors is an integer number (40407357375).

Almost surely, 2^315528086221 is an apocalyptic number.

It is an amenable number.

315528086221 is a deficient number, since it is larger than the sum of its proper divisors (7730772779).

315528086221 is an equidigital number, since it uses as much as digits as its factorization.

315528086221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832559.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 315528086221 in words is "three hundred fifteen billion, five hundred twenty-eight million, eighty-six thousand, two hundred twenty-one".