3306831221 has 2 divisors, whose sum is σ = 3306831222. Its totient is φ = 3306831220.

The previous prime is 3306831197. The next prime is 3306831247. The reversal of 3306831221 is 1221386033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2759926225 + 546904996 = 52535^2 + 23386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3306831221 - 2¹⁴ = 3306814837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3306131221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1653415610 + 1653415611.

It is an arithmetic number, because the mean of its divisors is an integer number (1653415611).

Almost surely, 2^3306831221 is an apocalyptic number.

It is an amenable number.

3306831221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3306831221 is an equidigital number, since it uses as much as digits as its factorization.

3306831221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 3306831221 is about 57505.0538735510. The cubic root of 3306831221 is about 1489.8321539682.

The spelling of 3306831221 in words is "three billion, three hundred six million, eight hundred thirty-one thousand, two hundred twenty-one".