2166418239 has 16 divisors (see below), whose sum is σ = 3062221920. Its totient is φ = 1357655040.

The previous prime is 2166418223. The next prime is 2166418271. The reversal of 2166418239 is 9328146612.

It is not a de Polignac number, because 2166418239 - 2⁴ = 2166418223 is a prime.

It is a super-2 number, since 2×2166418239² = 9386735972543722242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2166418239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166418739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16659 + ... + 67899.

It is an arithmetic number, because the mean of its divisors is an integer number (191388870).

Almost surely, 2^2166418239 is an apocalyptic number.

2166418239 is a deficient number, since it is larger than the sum of its proper divisors (895803681).

2166418239 is a wasteful number, since it uses less digits than its factorization.

2166418239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52090.

The product of its digits is 124416, while the sum is 42.

The square root of 2166418239 is about 46544.7981948574. The cubic root of 2166418239 is about 1293.9398884108.

It can be divided in two parts, 21664 and 18239, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 2166418239 in words is "two billion, one hundred sixty-six million, four hundred eighteen thousand, two hundred thirty-nine".