2165423 has 4 divisors (see below), whose sum is σ = 2332008. Its totient is φ = 1998840.

The previous prime is 2165413. The next prime is 2165453. The reversal of 2165423 is 3245612.

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 2165423 - 2¹⁰ = 2164399 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 (2165413) 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, 83273 + ... + 83298.

It is an arithmetic number, because the mean of its divisors is an integer number (583002).

2^2165423 is an apocalyptic number.

2165423 is a deficient number, since it is larger than the sum of its proper divisors (166585).

2165423 is a wasteful number, since it uses less digits than its factorization.

2165423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166584.

The product of its digits is 1440, while the sum is 23.

The square root of 2165423 is about 1471.5376311872. The cubic root of 2165423 is about 129.3741715428.

The spelling of 2165423 in words is "two million, one hundred sixty-five thousand, four hundred twenty-three".