13168531217 has 4 divisors (see below), whose sum is σ = 13289343540. Its totient is φ = 13047718896.

The previous prime is 13168531163. The next prime is 13168531219. The reversal of 13168531217 is 71213586131.

13168531217 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, and also an emirpimes, since its reverse is a distinct semiprime: 71213586131 = 347 ⋅205226473.

It can be written as a sum of positive squares in 2 ways, for example, as 11450926081 + 1717605136 = 107009^2 + 41444^2 .

It is a cyclic number.

It is not a de Polignac number, because 13168531217 - 2¹⁸ = 13168269073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13168531219) 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, 60405998 + ... + 60406215.

It is an arithmetic number, because the mean of its divisors is an integer number (3322335885).

Almost surely, 2^13168531217 is an apocalyptic number.

It is an amenable number.

13168531217 is a deficient number, since it is larger than the sum of its proper divisors (120812323).

13168531217 is a wasteful number, since it uses less digits than its factorization.

13168531217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120812322.

The product of its digits is 30240, while the sum is 38.

The spelling of 13168531217 in words is "thirteen billion, one hundred sixty-eight million, five hundred thirty-one thousand, two hundred seventeen".