13215907009 has 2 divisors, whose sum is σ = 13215907010. Its totient is φ = 13215907008.

The previous prime is 13215906989. The next prime is 13215907021. The reversal of 13215907009 is 90070951231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11990907009 + 1225000000 = 109503^2 + 35000^2 .

It is a cyclic number.

It is not a de Polignac number, because 13215907009 - 2⁹ = 13215906497 is a prime.

It is not a weakly prime, because it can be changed into another prime (13215907069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6607953504 + 6607953505.

It is an arithmetic number, because the mean of its divisors is an integer number (6607953505).

Almost surely, 2^13215907009 is an apocalyptic number.

It is an amenable number.

13215907009 is a deficient number, since it is larger than the sum of its proper divisors (1).

13215907009 is an equidigital number, since it uses as much as digits as its factorization.

13215907009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 37.

The spelling of 13215907009 in words is "thirteen billion, two hundred fifteen million, nine hundred seven thousand, nine".