11517217 has 4 divisors (see below), whose sum is σ = 11527360. Its totient is φ = 11507076.

The previous prime is 11517203. The next prime is 11517221. The reversal of 11517217 is 71271511.

11517217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11517217 - 2¹⁵ = 11484449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11517191 and 11517200.

It is not an unprimeable number, because it can be changed into a prime (11517257) 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, 3117 + ... + 5722.

It is an arithmetic number, because the mean of its divisors is an integer number (2881840).

Almost surely, 2^11517217 is an apocalyptic number.

It is an amenable number.

11517217 is a deficient number, since it is larger than the sum of its proper divisors (10143).

11517217 is an equidigital number, since it uses as much as digits as its factorization.

11517217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10142.

The product of its digits is 490, while the sum is 25.

The square root of 11517217 is about 3393.7025503129. The cubic root of 11517217 is about 225.8304586385.

Adding to 11517217 its reverse (71271511), we get a palindrome (82788728).

The spelling of 11517217 in words is "eleven million, five hundred seventeen thousand, two hundred seventeen".