2217505 has 4 divisors (see below), whose sum is σ = 2661012. Its totient is φ = 1774000.

The previous prime is 2217503. The next prime is 2217539. The reversal of 2217505 is 5057122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 279841 + 1937664 = 529^2 + 1392^2 .

It is not a de Polignac number, because 2217505 - 2¹ = 2217503 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2217503) 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, 221746 + ... + 221755.

It is an arithmetic number, because the mean of its divisors is an integer number (665253).

2^2217505 is an apocalyptic number.

It is an amenable number.

2217505 is a deficient number, since it is larger than the sum of its proper divisors (443507).

2217505 is an equidigital number, since it uses as much as digits as its factorization.

2217505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443506.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 2217505 is about 1489.1289400183. The cubic root of 2217505 is about 130.4031861229.

The spelling of 2217505 in words is "two million, two hundred seventeen thousand, five hundred five".