2150685065 has 4 divisors (see below), whose sum is σ = 2580822084. Its totient is φ = 1720548048.

The previous prime is 2150685041. The next prime is 2150685071. The reversal of 2150685065 is 5605860512.

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 1190181001 + 960504064 = 34499^2 + 30992^2 .

It is a cyclic number.

It is not a de Polignac number, because 2150685065 - 2²⁴ = 2133907849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215068502 + ... + 215068511.

It is an arithmetic number, because the mean of its divisors is an integer number (645205521).

Almost surely, 2^2150685065 is an apocalyptic number.

It is an amenable number.

2150685065 is a deficient number, since it is larger than the sum of its proper divisors (430137019).

2150685065 is an equidigital number, since it uses as much as digits as its factorization.

2150685065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430137018.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 2150685065 is about 46375.4791349912. The cubic root of 2150685065 is about 1290.7999495224.

The spelling of 2150685065 in words is "two billion, one hundred fifty million, six hundred eighty-five thousand, sixty-five".