2065520165 has 4 divisors (see below), whose sum is σ = 2478624204. Its totient is φ = 1652416128.

The previous prime is 2065520141. The next prime is 2065520167. The reversal of 2065520165 is 5610255602.

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 1436864836 + 628655329 = 37906^2 + 25073^2 .

It is a cyclic number.

It is not a de Polignac number, because 2065520165 - 2⁶ = 2065520101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2065520167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206552012 + ... + 206552021.

It is an arithmetic number, because the mean of its divisors is an integer number (619656051).

Almost surely, 2^2065520165 is an apocalyptic number.

It is an amenable number.

2065520165 is a deficient number, since it is larger than the sum of its proper divisors (413104039).

2065520165 is an equidigital number, since it uses as much as digits as its factorization.

2065520165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413104038.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 2065520165 is about 45447.9940701457. The cubic root of 2065520165 is about 1273.5318566886.

Adding to 2065520165 its reverse (5610255602), we get a palindrome (7675775767).

The spelling of 2065520165 in words is "two billion, sixty-five million, five hundred twenty thousand, one hundred sixty-five".