2217565 has 16 divisors (see below), whose sum is σ = 3220992. Its totient is φ = 1430784.

The previous prime is 2217557. The next prime is 2217569. The reversal of 2217565 is 5657122.

It is a cyclic number.

It is not a de Polignac number, because 2217565 - 2³ = 2217557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1269 + ... + 2458.

It is an arithmetic number, because the mean of its divisors is an integer number (201312).

2^2217565 is an apocalyptic number.

It is an amenable number.

2217565 is a deficient number, since it is larger than the sum of its proper divisors (1003427).

2217565 is a wasteful number, since it uses less digits than its factorization.

2217565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756.

The product of its digits is 4200, while the sum is 28.

The square root of 2217565 is about 1489.1490858876. The cubic root of 2217565 is about 130.4043622375.

The spelling of 2217565 in words is "two million, two hundred seventeen thousand, five hundred sixty-five".