2165353105 has 4 divisors (see below), whose sum is σ = 2598423732. Its totient is φ = 1732282480.

The previous prime is 2165353067. The next prime is 2165353153. The reversal of 2165353105 is 5013535612.

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 1279635984 + 885717121 = 35772^2 + 29761^2 .

It is not a de Polignac number, because 2165353105 - 2⁷ = 2165352977 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216535306 + ... + 216535315.

It is an arithmetic number, because the mean of its divisors is an integer number (649605933).

Almost surely, 2^2165353105 is an apocalyptic number.

It is an amenable number.

2165353105 is a deficient number, since it is larger than the sum of its proper divisors (433070627).

2165353105 is an equidigital number, since it uses as much as digits as its factorization.

2165353105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433070626.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 2165353105 is about 46533.3547576359. The cubic root of 2165353105 is about 1293.7277955846.

Adding to 2165353105 its reverse (5013535612), we get a palindrome (7178888717).

The spelling of 2165353105 in words is "two billion, one hundred sixty-five million, three hundred fifty-three thousand, one hundred five".