11311217 has 2 divisors, whose sum is σ = 11311218. Its totient is φ = 11311216.

The previous prime is 11311177. The next prime is 11311219. The reversal of 11311217 is 71211311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11182336 + 128881 = 3344^2 + 359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11311217 is a prime.

Together with 11311219, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11311195 and 11311204.

It is not a weakly prime, because it can be changed into another prime (11311219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655608 + 5655609.

It is an arithmetic number, because the mean of its divisors is an integer number (5655609).

Almost surely, 2^11311217 is an apocalyptic number.

It is an amenable number.

11311217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311217 is an equidigital number, since it uses as much as digits as its factorization.

11311217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42, while the sum is 17.

The square root of 11311217 is about 3363.2152770823. The cubic root of 11311217 is about 224.4759292516.

Adding to 11311217 its reverse (71211311), we get a palindrome (82522528).

The spelling of 11311217 in words is "eleven million, three hundred eleven thousand, two hundred seventeen".