32204728221 has 4 divisors (see below), whose sum is σ = 42939637632. Its totient is φ = 21469818812.

The previous prime is 32204728219. The next prime is 32204728223. The reversal of 32204728221 is 12282740223.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (32204728219) and next prime (32204728223).

It is a cyclic number.

It is not a de Polignac number, because 32204728221 - 2¹ = 32204728219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32204728223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5367454701 + ... + 5367454706.

It is an arithmetic number, because the mean of its divisors is an integer number (10734909408).

Almost surely, 2^32204728221 is an apocalyptic number.

It is an amenable number.

32204728221 is a deficient number, since it is larger than the sum of its proper divisors (10734909411).

32204728221 is a wasteful number, since it uses less digits than its factorization.

32204728221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10734909410.

The product of its (nonzero) digits is 21504, while the sum is 33.

The spelling of 32204728221 in words is "thirty-two billion, two hundred four million, seven hundred twenty-eight thousand, two hundred twenty-one".