32020023221 has 8 divisors (see below), whose sum is σ = 32902515384. Its totient is φ = 31138430400.

The previous prime is 32020023187. The next prime is 32020023223. The reversal of 32020023221 is 12232002023.

It can be written as a sum of positive squares in 4 ways, for example, as 22516503025 + 9503520196 = 150055^2 + 97486^2 .

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

It is not a de Polignac number, because 32020023221 - 2²² = 32015828917 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 32020023221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32020023223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152330 + ... + 295371.

It is an arithmetic number, because the mean of its divisors is an integer number (4112814423).

Almost surely, 2^32020023221 is an apocalyptic number.

It is an amenable number.

32020023221 is a deficient number, since it is larger than the sum of its proper divisors (882492163).

32020023221 is a wasteful number, since it uses less digits than its factorization.

32020023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449671.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 32020023221 its reverse (12232002023), we get a palindrome (44252025244).

The spelling of 32020023221 in words is "thirty-two billion, twenty million, twenty-three thousand, two hundred twenty-one".