11431251317 has 4 divisors (see below), whose sum is σ = 11436543276. Its totient is φ = 11425959360.

The previous prime is 11431251313. The next prime is 11431251319. The reversal of 11431251317 is 71315213411.

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 8213071876 + 3218179441 = 90626^2 + 56729^2 .

It is a cyclic number.

It is not a de Polignac number, because 11431251317 - 2² = 11431251313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11431251317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431251313) 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, 2642738 + ... + 2647059.

It is an arithmetic number, because the mean of its divisors is an integer number (2859135819).

Almost surely, 2^11431251317 is an apocalyptic number.

It is an amenable number.

11431251317 is a deficient number, since it is larger than the sum of its proper divisors (5291959).

11431251317 is an equidigital number, since it uses as much as digits as its factorization.

11431251317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291958.

The product of its digits is 2520, while the sum is 29.

Adding to 11431251317 its reverse (71315213411), we get a palindrome (82746464728).

The spelling of 11431251317 in words is "eleven billion, four hundred thirty-one million, two hundred fifty-one thousand, three hundred seventeen".