3243220321 has 4 divisors (see below), whose sum is σ = 3538058544. Its totient is φ = 2948382100.

The previous prime is 3243220313. The next prime is 3243220349. The reversal of 3243220321 is 1230223423.

3243220321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 3243220321 - 2³ = 3243220313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3243220292 and 3243220301.

It is not an unprimeable number, because it can be changed into a prime (3243220391) 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, 147419095 + ... + 147419116.

It is an arithmetic number, because the mean of its divisors is an integer number (884514636).

Almost surely, 2^3243220321 is an apocalyptic number.

It is an amenable number.

3243220321 is a deficient number, since it is larger than the sum of its proper divisors (294838223).

3243220321 is a wasteful number, since it uses less digits than its factorization.

3243220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294838222.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 3243220321 is about 56949.2784941126. The cubic root of 3243220321 is about 1480.2173288411.

Adding to 3243220321 its reverse (1230223423), we get a palindrome (4473443744).

The spelling of 3243220321 in words is "three billion, two hundred forty-three million, two hundred twenty thousand, three hundred twenty-one".