2163180085 has 8 divisors (see below), whose sum is σ = 2831799456. Its totient is φ = 1573221840.

The previous prime is 2163180083. The next prime is 2163180119. The reversal of 2163180085 is 5800813612.

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

It is not a de Polignac number, because 2163180085 - 2¹ = 2163180083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2163180085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163180083) 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, 19665219 + ... + 19665328.

It is an arithmetic number, because the mean of its divisors is an integer number (353974932).

Almost surely, 2^2163180085 is an apocalyptic number.

It is an amenable number.

2163180085 is a deficient number, since it is larger than the sum of its proper divisors (668619371).

2163180085 is a wasteful number, since it uses less digits than its factorization.

2163180085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39330563.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2163180085 is about 46509.9998387444. Note that the first 3 decimals coincide. The cubic root of 2163180085 is about 1293.2948812315.

Adding to 2163180085 its reverse (5800813612), we get a palindrome (7963993697).

The spelling of 2163180085 in words is "two billion, one hundred sixty-three million, one hundred eighty thousand, eighty-five".