2172057218 has 8 divisors (see below), whose sum is σ = 3272439312. Its totient is φ = 1081244116.

The previous prime is 2172057161. The next prime is 2172057313. The reversal of 2172057218 is 8127502712.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2391680 + ... + 2392587.

It is an arithmetic number, because the mean of its divisors is an integer number (409054914).

Almost surely, 2^2172057218 is an apocalyptic number.

2172057218 is a deficient number, since it is larger than the sum of its proper divisors (1100382094).

2172057218 is a wasteful number, since it uses less digits than its factorization.

2172057218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784496.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 2172057218 is about 46605.3346517327. The cubic root of 2172057218 is about 1295.0615829154.

The spelling of 2172057218 in words is "two billion, one hundred seventy-two million, fifty-seven thousand, two hundred eighteen".