3221561071 has 2 divisors, whose sum is σ = 3221561072. Its totient is φ = 3221561070.

The previous prime is 3221561059. The next prime is 3221561107. The reversal of 3221561071 is 1701651223.

It is a happy number.

Together with next prime (3221561107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3221561071 - 2³¹ = 1074077423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3228561071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610780535 + 1610780536.

It is an arithmetic number, because the mean of its divisors is an integer number (1610780536).

Almost surely, 2^3221561071 is an apocalyptic number.

3221561071 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221561071 is an equidigital number, since it uses as much as digits as its factorization.

3221561071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 3221561071 is about 56758.7973005066. The cubic root of 3221561071 is about 1476.9148465550.

The spelling of 3221561071 in words is "three billion, two hundred twenty-one million, five hundred sixty-one thousand, seventy-one".