13218556213 has 4 divisors (see below), whose sum is σ = 13467962988. Its totient is φ = 12969149440.

The previous prime is 13218556201. The next prime is 13218556259. The reversal of 13218556213 is 31265581231.

13218556213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8321635729 + 4896920484 = 91223^2 + 69978^2 .

It is a cyclic number.

It is not a de Polignac number, because 13218556213 - 2⁵ = 13218556181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13218554213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124703308 + ... + 124703413.

It is an arithmetic number, because the mean of its divisors is an integer number (3366990747).

Almost surely, 2^13218556213 is an apocalyptic number.

It is an amenable number.

13218556213 is a deficient number, since it is larger than the sum of its proper divisors (249406775).

13218556213 is an equidigital number, since it uses as much as digits as its factorization.

13218556213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249406774.

The product of its digits is 43200, while the sum is 37.

The spelling of 13218556213 in words is "thirteen billion, two hundred eighteen million, five hundred fifty-six thousand, two hundred thirteen".