2305201665 has 64 divisors (see below), whose sum is σ = 4088238336. Its totient is φ = 1102159872.

The previous prime is 2305201643. The next prime is 2305201667. The reversal of 2305201665 is 5661025032.

It is not a de Polignac number, because 2305201665 - 2⁶ = 2305201601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2305201667) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 952537 + ... + 954953.

It is an arithmetic number, because the mean of its divisors is an integer number (63878724).

Almost surely, 2^2305201665 is an apocalyptic number.

It is an amenable number.

2305201665 is a deficient number, since it is larger than the sum of its proper divisors (1783036671).

2305201665 is a wasteful number, since it uses less digits than its factorization.

2305201665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2305201665 is about 48012.5157120516. The cubic root of 2305201665 is about 1321.0004783076. Note that the first 3 decimals are identical.

Adding to 2305201665 its reverse (5661025032), we get a palindrome (7966226697).

The spelling of 2305201665 in words is "two billion, three hundred five million, two hundred one thousand, six hundred sixty-five".