2185565223 has 16 divisors (see below), whose sum is σ = 2926636416. Its totient is φ = 1450784160.

The previous prime is 2185565209. The next prime is 2185565233. The reversal of 2185565223 is 3225655812.

It is not a de Polignac number, because 2185565223 - 2²⁰ = 2184516647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185565233) 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 15 ways as a sum of consecutive naturals, for example, 768961 + ... + 771797.

It is an arithmetic number, because the mean of its divisors is an integer number (182914776).

Almost surely, 2^2185565223 is an apocalyptic number.

2185565223 is a deficient number, since it is larger than the sum of its proper divisors (741071193).

2185565223 is a wasteful number, since it uses less digits than its factorization.

2185565223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854.

The product of its digits is 144000, while the sum is 39.

The square root of 2185565223 is about 46750.0291229856. The cubic root of 2185565223 is about 1297.7406956912.

It can be divided in two parts, 21855 and 65223, that added together give a palindrome (87078).

The spelling of 2185565223 in words is "two billion, one hundred eighty-five million, five hundred sixty-five thousand, two hundred twenty-three".