2165219 has 4 divisors (see below), whose sum is σ = 2474544. Its totient is φ = 1855896.

The previous prime is 2165213. The next prime is 2165231. The reversal of 2165219 is 9125612.

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

It is not a de Polignac number, because 2165219 - 2⁸ = 2164963 is a prime.

It is a super-2 number, since 2×2165219² = 9376346635922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165213) 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, 154652 + ... + 154665.

It is an arithmetic number, because the mean of its divisors is an integer number (618636).

2^2165219 is an apocalyptic number.

2165219 is a deficient number, since it is larger than the sum of its proper divisors (309325).

2165219 is an equidigital number, since it uses as much as digits as its factorization.

2165219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309324.

The product of its digits is 1080, while the sum is 26.

The square root of 2165219 is about 1471.4683143038. The cubic root of 2165219 is about 129.3701087247.

The spelling of 2165219 in words is "two million, one hundred sixty-five thousand, two hundred nineteen".