2168217 has 6 divisors (see below), whose sum is σ = 3131882. Its totient is φ = 1445472.

The previous prime is 2168183. The next prime is 2168219. The reversal of 2168217 is 7128612.

It can be written as a sum of positive squares in only one way, i.e., 1679616 + 488601 = 1296^2 + 699^2 .

It is not a de Polignac number, because 2168217 - 2⁸ = 2167961 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2168219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120448 + ... + 120465.

2^2168217 is an apocalyptic number.

It is an amenable number.

2168217 is a deficient number, since it is larger than the sum of its proper divisors (963665).

2168217 is a wasteful number, since it uses less digits than its factorization.

2168217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240919 (or 240916 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2168217 is about 1472.4866722657. The cubic root of 2168217 is about 129.4297905574.

The spelling of 2168217 in words is "two million, one hundred sixty-eight thousand, two hundred seventeen".