2172565065 has 64 divisors (see below), whose sum is σ = 4038543360. Its totient is φ = 985635840.

The previous prime is 2172565063. The next prime is 2172565069. The reversal of 2172565065 is 5605652712.

2172565065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2172565065 - 2¹ = 2172565063 is a prime.

It is a super-3 number, since 3×2172565065³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2172565061) 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, 499932 + ... + 504258.

It is an arithmetic number, because the mean of its divisors is an integer number (63102240).

Almost surely, 2^2172565065 is an apocalyptic number.

It is an amenable number.

2172565065 is a deficient number, since it is larger than the sum of its proper divisors (1865978295).

2172565065 is a wasteful number, since it uses less digits than its factorization.

2172565065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4542.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 2172565065 is about 46610.7827117288. The cubic root of 2172565065 is about 1295.1625074955.

The spelling of 2172565065 in words is "two billion, one hundred seventy-two million, five hundred sixty-five thousand, sixty-five".