3201640217 has 4 divisors (see below), whose sum is σ = 3204352356. Its totient is φ = 3198928080.

The previous prime is 3201640177. The next prime is 3201640219. The reversal of 3201640217 is 7120461023.

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 2914812121 + 286828096 = 53989^2 + 16936^2 .

It is a cyclic number.

It is not a de Polignac number, because 3201640217 - 2⁶ = 3201640153 is a prime.

It is a super-2 number, since 2×3201640217² = 20501000158223614178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3201640219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354298 + ... + 1356659.

It is an arithmetic number, because the mean of its divisors is an integer number (801088089).

Almost surely, 2^3201640217 is an apocalyptic number.

It is an amenable number.

3201640217 is a deficient number, since it is larger than the sum of its proper divisors (2712139).

3201640217 is a wasteful number, since it uses less digits than its factorization.

3201640217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712138.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 3201640217 is about 56583.0382446895. The cubic root of 3201640217 is about 1473.8643319133.

The spelling of 3201640217 in words is "three billion, two hundred one million, six hundred forty thousand, two hundred seventeen".