2205171705 has 64 divisors (see below), whose sum is σ = 3900441600. Its totient is φ = 1055013120.

The previous prime is 2205171679. The next prime is 2205171721. The reversal of 2205171705 is 5071715022.

It is not a de Polignac number, because 2205171705 - 2¹⁸ = 2204909561 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5818206 + ... + 5818584.

It is an arithmetic number, because the mean of its divisors is an integer number (60944400).

Almost surely, 2^2205171705 is an apocalyptic number.

It is an amenable number.

2205171705 is a deficient number, since it is larger than the sum of its proper divisors (1695269895).

2205171705 is a wasteful number, since it uses less digits than its factorization.

2205171705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 2205171705 is about 46959.2557969140. The cubic root of 2205171705 is about 1301.6097819284.

Adding to 2205171705 its reverse (5071715022), we get a palindrome (7276886727).

It can be divided in two parts, 220517 and 1705, that added together give a palindrome (222222).

The spelling of 2205171705 in words is "two billion, two hundred five million, one hundred seventy-one thousand, seven hundred five".