3220385965 has 4 divisors (see below), whose sum is σ = 3864463164. Its totient is φ = 2576308768.

The previous prime is 3220385933. The next prime is 3220385977. The reversal of 3220385965 is 5695830223.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2406196809 + 814189156 = 49053^2 + 28534^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220385965 - 2⁵ = 3220385933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322038592 + ... + 322038601.

It is an arithmetic number, because the mean of its divisors is an integer number (966115791).

Almost surely, 2^3220385965 is an apocalyptic number.

It is an amenable number.

3220385965 is a deficient number, since it is larger than the sum of its proper divisors (644077199).

3220385965 is an equidigital number, since it uses as much as digits as its factorization.

3220385965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644077198.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 3220385965 is about 56748.4446042356. Note that the first 3 decimals coincide. The cubic root of 3220385965 is about 1476.7352501294.

The spelling of 3220385965 in words is "three billion, two hundred twenty million, three hundred eighty-five thousand, nine hundred sixty-five".