3221330261 has 2 divisors, whose sum is σ = 3221330262. Its totient is φ = 3221330260.

The previous prime is 3221330207. The next prime is 3221330291. The reversal of 3221330261 is 1620331223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3044280625 + 177049636 = 55175^2 + 13306^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221330261 - 2¹⁴ = 3221313877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3221330201) 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 as a sum of consecutive naturals, namely, 1610665130 + 1610665131.

It is an arithmetic number, because the mean of its divisors is an integer number (1610665131).

Almost surely, 2^3221330261 is an apocalyptic number.

It is an amenable number.

3221330261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221330261 is an equidigital number, since it uses as much as digits as its factorization.

3221330261 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 23.

The square root of 3221330261 is about 56756.7640109970. The cubic root of 3221330261 is about 1476.8795743325.

Adding to 3221330261 its reverse (1620331223), we get a palindrome (4841661484).

The spelling of 3221330261 in words is "three billion, two hundred twenty-one million, three hundred thirty thousand, two hundred sixty-one".