11215717 has 2 divisors, whose sum is σ = 11215718. Its totient is φ = 11215716.

The previous prime is 11215703. The next prime is 11215727. The reversal of 11215717 is 71751211.

11215717 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9449476 + 1766241 = 3074^2 + 1329^2 .

It is a cyclic number.

It is not a de Polignac number, because 11215717 - 2¹⁵ = 11182949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11215691 and 11215700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11215727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5607858 + 5607859.

It is an arithmetic number, because the mean of its divisors is an integer number (5607859).

Almost surely, 2^11215717 is an apocalyptic number.

It is an amenable number.

11215717 is a deficient number, since it is larger than the sum of its proper divisors (1).

11215717 is an equidigital number, since it uses as much as digits as its factorization.

11215717 is an evil number, because the sum of its binary digits is even.

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

The square root of 11215717 is about 3348.9874589195. The cubic root of 11215717 is about 223.8423968449.

Adding to 11215717 its reverse (71751211), we get a palindrome (82966928).

The spelling of 11215717 in words is "eleven million, two hundred fifteen thousand, seven hundred seventeen".