32320505521 has 4 divisors (see below), whose sum is σ = 32325344100. Its totient is φ = 32315666944.

The previous prime is 32320505479. The next prime is 32320505551. The reversal of 32320505521 is 12550502323.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12550502323 = 229 ⋅54805687.

It can be written as a sum of positive squares in 2 ways, for example, as 23031401121 + 9289104400 = 151761^2 + 96380^2 .

It is a cyclic number.

It is not a de Polignac number, because 32320505521 - 2¹¹ = 32320503473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32320505521.

It is not an unprimeable number, because it can be changed into a prime (32320505551) 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 3 ways as a sum of consecutive naturals, for example, 2409256 + ... + 2422633.

It is an arithmetic number, because the mean of its divisors is an integer number (8081336025).

Almost surely, 2^32320505521 is an apocalyptic number.

It is an amenable number.

32320505521 is a deficient number, since it is larger than the sum of its proper divisors (4838579).

32320505521 is an equidigital number, since it uses as much as digits as its factorization.

32320505521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838578.

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 32320505521 in words is "thirty-two billion, three hundred twenty million, five hundred five thousand, five hundred twenty-one".