2172866395 has 16 divisors (see below), whose sum is σ = 2994064128. Its totient is φ = 1482899040.

The previous prime is 2172866369. The next prime is 2172866401. The reversal of 2172866395 is 5936682712.

It is not a de Polignac number, because 2172866395 - 2¹³ = 2172858203 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139729 + ... + 154498.

It is an arithmetic number, because the mean of its divisors is an integer number (187129008).

Almost surely, 2^2172866395 is an apocalyptic number.

2172866395 is a deficient number, since it is larger than the sum of its proper divisors (821197733).

2172866395 is a wasteful number, since it uses less digits than its factorization.

2172866395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294450.

The product of its digits is 1088640, while the sum is 49.

The square root of 2172866395 is about 46614.0150062189. The cubic root of 2172866395 is about 1295.2223834585. Note that the first 3 decimals are identical.

The spelling of 2172866395 in words is "two billion, one hundred seventy-two million, eight hundred sixty-six thousand, three hundred ninety-five".