13215386669 has 2 divisors, whose sum is σ = 13215386670. Its totient is φ = 13215386668.

The previous prime is 13215386651. The next prime is 13215386671. The reversal of 13215386669 is 96668351231.

It is a happy number.

13215386669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7662901444 + 5552485225 = 87538^2 + 74515^2 .

It is a cyclic number.

It is not a de Polignac number, because 13215386669 - 2³² = 8920419373 is a prime.

It is a super-2 number, since 2×13215386669² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 13215386671, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13215385669) 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 as a sum of consecutive naturals, namely, 6607693334 + 6607693335.

It is an arithmetic number, because the mean of its divisors is an integer number (6607693335).

Almost surely, 2^13215386669 is an apocalyptic number.

It is an amenable number.

13215386669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13215386669 is an equidigital number, since it uses as much as digits as its factorization.

13215386669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 50.

The spelling of 13215386669 in words is "thirteen billion, two hundred fifteen million, three hundred eighty-six thousand, six hundred sixty-nine".