12215896317 has 6 divisors (see below), whose sum is σ = 17645183582. Its totient is φ = 8143930872.

The previous prime is 12215896279. The next prime is 12215896333. The reversal of 12215896317 is 71369851221.

12215896317 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 5 + 8 + 9 + 631 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11417777316 + 798119001 = 106854^2 + 28251^2 .

It is not a de Polignac number, because 12215896317 - 2³⁰ = 11142154493 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 (12215895317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678660898 + ... + 678660915.

Almost surely, 2^12215896317 is an apocalyptic number.

It is an amenable number.

12215896317 is a deficient number, since it is larger than the sum of its proper divisors (5429287265).

12215896317 is a wasteful number, since it uses less digits than its factorization.

12215896317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357321819 (or 1357321816 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The spelling of 12215896317 in words is "twelve billion, two hundred fifteen million, eight hundred ninety-six thousand, three hundred seventeen".