8221617 has 6 divisors (see below), whose sum is σ = 11875682. Its totient is φ = 5481072.

The previous prime is 8221597. The next prime is 8221621. The reversal of 8221617 is 7161228.

It can be written as a sum of positive squares in only one way, i.e., 4626801 + 3594816 = 2151^2 + 1896^2 .

It is not a de Polignac number, because 8221617 - 2¹¹ = 8219569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 456748 + ... + 456765.

Almost surely, 2^8221617 is an apocalyptic number.

It is an amenable number.

8221617 is a deficient number, since it is larger than the sum of its proper divisors (3654065).

8221617 is a wasteful number, since it uses less digits than its factorization.

8221617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913519 (or 913516 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 8221617 is about 2867.3362202574. The cubic root of 8221617 is about 201.8300125322.

The spelling of 8221617 in words is "eight million, two hundred twenty-one thousand, six hundred seventeen".