3221131409 has 2 divisors, whose sum is σ = 3221131410. Its totient is φ = 3221131408.

The previous prime is 3221131391. The next prime is 3221131429. The reversal of 3221131409 is 9041311223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1986663184 + 1234468225 = 44572^2 + 35135^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221131409 - 2²⁴ = 3204354193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3221131429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610565704 + 1610565705.

It is an arithmetic number, because the mean of its divisors is an integer number (1610565705).

Almost surely, 2^3221131409 is an apocalyptic number.

It is an amenable number.

3221131409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221131409 is an equidigital number, since it uses as much as digits as its factorization.

3221131409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 3221131409 is about 56755.0121927570. The cubic root of 3221131409 is about 1476.8491845580.

The spelling of 3221131409 in words is "three billion, two hundred twenty-one million, one hundred thirty-one thousand, four hundred nine".