3221323221 has 4 divisors (see below), whose sum is σ = 4295097632. Its totient is φ = 2147548812.

The previous prime is 3221323211. The next prime is 3221323223. The reversal of 3221323221 is 1223231223.

It is a happy number.

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 not a de Polignac number, because 3221323221 - 2²² = 3217128917 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 (3221323223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536887201 + ... + 536887206.

It is an arithmetic number, because the mean of its divisors is an integer number (1073774408).

Almost surely, 2^3221323221 is an apocalyptic number.

It is an amenable number.

3221323221 is a deficient number, since it is larger than the sum of its proper divisors (1073774411).

3221323221 is a wasteful number, since it uses less digits than its factorization.

3221323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073774410.

The product of its digits is 864, while the sum is 21.

The square root of 3221323221 is about 56756.7019919234. The cubic root of 3221323221 is about 1476.8784984581.

Adding to 3221323221 its reverse (1223231223), we get a palindrome (4444554444).

The spelling of 3221323221 in words is "three billion, two hundred twenty-one million, three hundred twenty-three thousand, two hundred twenty-one".