11287357217 has 2 divisors, whose sum is σ = 11287357218. Its totient is φ = 11287357216.

The previous prime is 11287357199. The next prime is 11287357219. The reversal of 11287357217 is 71275378211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11075247121 + 212110096 = 105239^2 + 14564^2 .

It is a cyclic number.

It is not a de Polignac number, because 11287357217 - 2³⁰ = 10213615393 is a prime.

Together with 11287357219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11287357219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5643678608 + 5643678609.

It is an arithmetic number, because the mean of its divisors is an integer number (5643678609).

Almost surely, 2^11287357217 is an apocalyptic number.

It is an amenable number.

11287357217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11287357217 is an equidigital number, since it uses as much as digits as its factorization.

11287357217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164640, while the sum is 44.

The spelling of 11287357217 in words is "eleven billion, two hundred eighty-seven million, three hundred fifty-seven thousand, two hundred seventeen".