2005517 has 4 divisors (see below), whose sum is σ = 2009280. Its totient is φ = 2001756.

The previous prime is 2005499. The next prime is 2005519. The reversal of 2005517 is 7155002.

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 an emirpimes, since its reverse is a distinct semiprime: 7155002 = 2 ⋅3577501.

It is a cyclic number.

It is not a de Polignac number, because 2005517 - 2⁶ = 2005453 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 (2005519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 917 + ... + 2202.

It is an arithmetic number, because the mean of its divisors is an integer number (502320).

2^2005517 is an apocalyptic number.

It is an amenable number.

2005517 is a deficient number, since it is larger than the sum of its proper divisors (3763).

2005517 is an equidigital number, since it uses as much as digits as its factorization.

2005517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3762.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 2005517 is about 1416.1627731303. The cubic root of 2005517 is about 126.1078483691.

The spelling of 2005517 in words is "two million, five thousand, five hundred seventeen".