2161173 has 8 divisors (see below), whose sum is σ = 3293248. Its totient is φ = 1234944.

The previous prime is 2161163. The next prime is 2161177. The reversal of 2161173 is 3711612.

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

It is not a de Polignac number, because 2161173 - 2⁴ = 2161157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 102913 = 2161173 / (2 + 1 + 6 + 1 + 1 + 7 + 3).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161177) 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, 51436 + ... + 51477.

It is an arithmetic number, because the mean of its divisors is an integer number (411656).

2^2161173 is an apocalyptic number.

It is an amenable number.

2161173 is a deficient number, since it is larger than the sum of its proper divisors (1132075).

2161173 is a wasteful number, since it uses less digits than its factorization.

2161173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102923.

The product of its digits is 252, while the sum is 21.

The square root of 2161173 is about 1470.0928542102. The cubic root of 2161173 is about 129.2894767220.

Adding to 2161173 its reverse (3711612), we get a palindrome (5872785).

The spelling of 2161173 in words is "two million, one hundred sixty-one thousand, one hundred seventy-three".