13211252317 has 4 divisors (see below), whose sum is σ = 13233235036. Its totient is φ = 13189269600.

The previous prime is 13211252303. The next prime is 13211252323. The reversal of 13211252317 is 71325211231.

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 10823073156 + 2388179161 = 104034^2 + 48869^2 .

It is a cyclic number.

It is not a de Polignac number, because 13211252317 - 2²⁷ = 13077034589 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 (13211252377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10990458 + ... + 10991659.

It is an arithmetic number, because the mean of its divisors is an integer number (3308308759).

Almost surely, 2^13211252317 is an apocalyptic number.

It is an amenable number.

13211252317 is a deficient number, since it is larger than the sum of its proper divisors (21982719).

13211252317 is an equidigital number, since it uses as much as digits as its factorization.

13211252317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21982718.

The product of its digits is 2520, while the sum is 28.

Adding to 13211252317 its reverse (71325211231), we get a palindrome (84536463548).

The spelling of 13211252317 in words is "thirteen billion, two hundred eleven million, two hundred fifty-two thousand, three hundred seventeen".