3218845813 has 2 divisors, whose sum is σ = 3218845814. Its totient is φ = 3218845812.

The previous prime is 3218845801. The next prime is 3218845829. The reversal of 3218845813 is 3185488123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3206050884 + 12794929 = 56622^2 + 3577^2 .

It is a cyclic number.

It is not a de Polignac number, because 3218845813 - 2²⁹ = 2681974901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3218845813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3218845013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609422906 + 1609422907.

It is an arithmetic number, because the mean of its divisors is an integer number (1609422907).

Almost surely, 2^3218845813 is an apocalyptic number.

It is an amenable number.

3218845813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3218845813 is an equidigital number, since it uses as much as digits as its factorization.

3218845813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 43.

The square root of 3218845813 is about 56734.8729883129. The cubic root of 3218845813 is about 1476.4997960102.

The spelling of 3218845813 in words is "three billion, two hundred eighteen million, eight hundred forty-five thousand, eight hundred thirteen".