2205506785 has 4 divisors (see below), whose sum is σ = 2646608148. Its totient is φ = 1764405424.

The previous prime is 2205506783. The next prime is 2205506827. The reversal of 2205506785 is 5876055022.

2205506785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 498494929 + 1707011856 = 22327^2 + 41316^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205506785 - 2¹ = 2205506783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2205506783) 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, 220550674 + ... + 220550683.

It is an arithmetic number, because the mean of its divisors is an integer number (661652037).

Almost surely, 2^2205506785 is an apocalyptic number.

It is an amenable number.

2205506785 is a deficient number, since it is larger than the sum of its proper divisors (441101363).

2205506785 is an equidigital number, since it uses as much as digits as its factorization.

2205506785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441101362.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 2205506785 is about 46962.8234351386. The cubic root of 2205506785 is about 1301.6757059432.

The spelling of 2205506785 in words is "two billion, two hundred five million, five hundred six thousand, seven hundred eighty-five".