2205704845 has 4 divisors (see below), whose sum is σ = 2646845820. Its totient is φ = 1764563872.

The previous prime is 2205704833. The next prime is 2205704849. The reversal of 2205704845 is 5484075022.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 774898569 + 1430806276 = 27837^2 + 37826^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205704845 - 2¹⁹ = 2205180557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205704849) 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, 220570480 + ... + 220570489.

It is an arithmetic number, because the mean of its divisors is an integer number (661711455).

Almost surely, 2^2205704845 is an apocalyptic number.

It is an amenable number.

2205704845 is a deficient number, since it is larger than the sum of its proper divisors (441140975).

2205704845 is an equidigital number, since it uses as much as digits as its factorization.

2205704845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441140974.

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 2205704845 is about 46964.9320770296. The cubic root of 2205704845 is about 1301.7146693499.

Adding to 2205704845 its reverse (5484075022), we get a palindrome (7689779867).

The spelling of 2205704845 in words is "two billion, two hundred five million, seven hundred four thousand, eight hundred forty-five".