11220617 has 4 divisors (see below), whose sum is σ = 11228160. Its totient is φ = 11213076.

The previous prime is 11220553. The next prime is 11220623. The reversal of 11220617 is 71602211.

11220617 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 71602211 = 197 ⋅363463.

It is a cyclic number.

It is not a de Polignac number, because 11220617 - 2⁶ = 11220553 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11220637) 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, 713 + ... + 4790.

It is an arithmetic number, because the mean of its divisors is an integer number (2807040).

Almost surely, 2^11220617 is an apocalyptic number.

It is an amenable number.

11220617 is a deficient number, since it is larger than the sum of its proper divisors (7543).

11220617 is an equidigital number, since it uses as much as digits as its factorization.

11220617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7542.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 11220617 is about 3349.7189434339. The cubic root of 11220617 is about 223.8749900369.

Adding to 11220617 its reverse (71602211), we get a palindrome (82822828).

The spelling of 11220617 in words is "eleven million, two hundred twenty thousand, six hundred seventeen".