2165003 has 4 divisors (see below), whose sum is σ = 2195568. Its totient is φ = 2134440.

The previous prime is 2164991. The next prime is 2165017. The reversal of 2165003 is 3005612.

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

It is a cyclic number.

It is not a de Polignac number, because 2165003 - 2¹⁰ = 2163979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15176 + ... + 15317.

It is an arithmetic number, because the mean of its divisors is an integer number (548892).

2^2165003 is an apocalyptic number.

2165003 is a deficient number, since it is larger than the sum of its proper divisors (30565).

2165003 is an equidigital number, since it uses as much as digits as its factorization.

2165003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30564.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2165003 is about 1471.3949163974. The cubic root of 2165003 is about 129.3658066390.

The spelling of 2165003 in words is "two million, one hundred sixty-five thousand, three".