2173165 has 8 divisors (see below), whose sum is σ = 2626200. Its totient is φ = 1726272.

The previous prime is 2173153. The next prime is 2173183. The reversal of 2173165 is 5613712.

It can be written as a sum of positive squares in 4 ways, for example, as 459684 + 1713481 = 678^2 + 1309^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2173165 is a prime.

It is a super-2 number, since 2×2173165² = 9445292234450, which contains 22 as substring.

It is an Ulam number.

2173165 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714 + ... + 2203.

It is an arithmetic number, because the mean of its divisors is an integer number (328275).

2^2173165 is an apocalyptic number.

It is an amenable number.

2173165 is a deficient number, since it is larger than the sum of its proper divisors (453035).

2173165 is a wasteful number, since it uses less digits than its factorization.

2173165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071.

The product of its digits is 1260, while the sum is 25.

The square root of 2173165 is about 1474.1658658374. The cubic root of 2173165 is about 129.5281712488.

Adding to 2173165 its reverse (5613712), we get a palindrome (7786877).

The spelling of 2173165 in words is "two million, one hundred seventy-three thousand, one hundred sixty-five".