2168213 has 4 divisors (see below), whose sum is σ = 2171328. Its totient is φ = 2165100.

The previous prime is 2168183. The next prime is 2168219. The reversal of 2168213 is 3128612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2168213 - 2⁶ = 2168149 is a prime.

It is a super-2 number, since 2×2168213² = 9402295226738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 20 + ... + 2082.

It is an arithmetic number, because the mean of its divisors is an integer number (542832).

2^2168213 is an apocalyptic number.

It is an amenable number.

2168213 is a deficient number, since it is larger than the sum of its proper divisors (3115).

2168213 is a wasteful number, since it uses less digits than its factorization.

2168213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114.

The product of its digits is 576, while the sum is 23.

The square root of 2168213 is about 1472.4853140184. The cubic root of 2168213 is about 129.4297109652.

The spelling of 2168213 in words is "two million, one hundred sixty-eight thousand, two hundred thirteen".