3221320231 has 16 divisors (see below), whose sum is σ = 3309447456. Its totient is φ = 3134342016.

The previous prime is 3221320229. The next prime is 3221320253. The reversal of 3221320231 is 1320231223.

It is a cyclic number.

It is not a de Polignac number, because 3221320231 - 2¹ = 3221320229 is a prime.

It is a super-2 number, since 2×3221320231² = 20753808061299786722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3221320199 and 3221320208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221320931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4394341 + ... + 4395073.

It is an arithmetic number, because the mean of its divisors is an integer number (206840466).

Almost surely, 2^3221320231 is an apocalyptic number.

3221320231 is a deficient number, since it is larger than the sum of its proper divisors (88127225).

3221320231 is a wasteful number, since it uses less digits than its factorization.

3221320231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3221320231 is about 56756.6756514157. The cubic root of 3221320231 is about 1476.8780415167.

Adding to 3221320231 its reverse (1320231223), we get a palindrome (4541551454).

The spelling of 3221320231 in words is "three billion, two hundred twenty-one million, three hundred twenty thousand, two hundred thirty-one".