2163205 has 16 divisors (see below), whose sum is σ = 2911104. Its totient is φ = 1529280.

The previous prime is 2163193. The next prime is 2163221. The reversal of 2163205 is 5023612.

It is a happy number.

It is not a de Polignac number, because 2163205 - 2¹¹ = 2161157 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 6² + 3¹¹ + 2¹⁵ + 0 + 5⁹ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1504 + ... + 2566.

It is an arithmetic number, because the mean of its divisors is an integer number (181944).

2^2163205 is an apocalyptic number.

It is an amenable number.

2163205 is a deficient number, since it is larger than the sum of its proper divisors (747899).

2163205 is a wasteful number, since it uses less digits than its factorization.

2163205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2163205 is about 1470.7838046430. The cubic root of 2163205 is about 129.3299846501.

Adding to 2163205 its reverse (5023612), we get a palindrome (7186817).

It can be divided in two parts, 216320 and 5, that multiplied together give a square (1081600 = 1040²).

The spelling of 2163205 in words is "two million, one hundred sixty-three thousand, two hundred five".