32505425221 has 8 divisors (see below), whose sum is σ = 32569826040. Its totient is φ = 32441080512.

The previous prime is 32505425213. The next prime is 32505425237. The reversal of 32505425221 is 12252450523.

It can be written as a sum of positive squares in 4 ways, for example, as 20552376321 + 11953048900 = 143361^2 + 109330^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 32505425221 - 2³ = 32505425213 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 (32505425201) 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, 1257495 + ... + 1283083.

It is an arithmetic number, because the mean of its divisors is an integer number (4071228255).

Almost surely, 2^32505425221 is an apocalyptic number.

It is an amenable number.

32505425221 is a deficient number, since it is larger than the sum of its proper divisors (64400819).

32505425221 is a wasteful number, since it uses less digits than its factorization.

32505425221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28055.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 32505425221 its reverse (12252450523), we get a palindrome (44757875744).

The spelling of 32505425221 in words is "thirty-two billion, five hundred five million, four hundred twenty-five thousand, two hundred twenty-one".