2164217 has 8 divisors (see below), whose sum is σ = 2376192. Its totient is φ = 1954800.

The previous prime is 2164193. The next prime is 2164223. The reversal of 2164217 is 7124612.

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

It is not a de Polignac number, because 2164217 - 2¹⁰ = 2163193 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2164192 and 2164201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164247) 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, 1448 + ... + 2534.

It is an arithmetic number, because the mean of its divisors is an integer number (297024).

2^2164217 is an apocalyptic number.

It is an amenable number.

2164217 is a deficient number, since it is larger than the sum of its proper divisors (211975).

2164217 is a wasteful number, since it uses less digits than its factorization.

2164217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279.

The product of its digits is 672, while the sum is 23.

The square root of 2164217 is about 1471.1277986633. The cubic root of 2164217 is about 129.3501494118.

Adding to 2164217 its sum of digits (23), we get a triangular number (2164240 = T₂₀₈₀).

Adding to 2164217 its reverse (7124612), we get a palindrome (9288829).

The spelling of 2164217 in words is "two million, one hundred sixty-four thousand, two hundred seventeen".