11305806217 has 4 divisors (see below), whose sum is σ = 11313231120. Its totient is φ = 11298381316.

The previous prime is 11305806199. The next prime is 11305806229. The reversal of 11305806217 is 71260850311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11305806217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11305806817) 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, 3710167 + ... + 3713212.

It is an arithmetic number, because the mean of its divisors is an integer number (2828307780).

Almost surely, 2^11305806217 is an apocalyptic number.

It is an amenable number.

11305806217 is a deficient number, since it is larger than the sum of its proper divisors (7424903).

11305806217 is an equidigital number, since it uses as much as digits as its factorization.

11305806217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7424902.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 11305806217 in words is "eleven billion, three hundred five million, eight hundred six thousand, two hundred seventeen".