3221329 has 4 divisors (see below), whose sum is σ = 3299940. Its totient is φ = 3142720.

The previous prime is 3221327. The next prime is 3221353. The reversal of 3221329 is 9231223.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1817104 + 1404225 = 1348^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221329 - 2¹ = 3221327 is a prime.

It is a Duffinian number.

3221329 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3221321) 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, 39244 + ... + 39325.

It is an arithmetic number, because the mean of its divisors is an integer number (824985).

Almost surely, 2^3221329 is an apocalyptic number.

It is an amenable number.

3221329 is a deficient number, since it is larger than the sum of its proper divisors (78611).

3221329 is an equidigital number, since it uses as much as digits as its factorization.

3221329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78610.

The product of its digits is 648, while the sum is 22.

The square root of 3221329 is about 1794.8061176629. The cubic root of 3221329 is about 147.6879381623.

The spelling of 3221329 in words is "three million, two hundred twenty-one thousand, three hundred twenty-nine".