2172057217 has 8 divisors (see below), whose sum is σ = 2392978752. Its totient is φ = 1955046000.

The previous prime is 2172057161. The next prime is 2172057313. The reversal of 2172057217 is 7127502712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2172057217 - 2²³ = 2163668609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172007217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 976413 + ... + 978634.

It is an arithmetic number, because the mean of its divisors is an integer number (299122344).

Almost surely, 2^2172057217 is an apocalyptic number.

It is an amenable number.

2172057217 is a deficient number, since it is larger than the sum of its proper divisors (220921535).

2172057217 is a wasteful number, since it uses less digits than its factorization.

2172057217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955159.

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 2172057217 is about 46605.3346410043. The cubic root of 2172057217 is about 1295.0615827167.

Adding to 2172057217 its reverse (7127502712), we get a palindrome (9299559929).

It can be divided in two parts, 217205 and 7217, that added together give a palindrome (224422).

The spelling of 2172057217 in words is "two billion, one hundred seventy-two million, fifty-seven thousand, two hundred seventeen".