2138213 has 12 divisors (see below), whose sum is σ = 2714112. Its totient is φ = 1665720.

The previous prime is 2138207. The next prime is 2138221. The reversal of 2138213 is 3128312.

It is not a de Polignac number, because 2138213 - 2⁴ = 2138197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1445 + ... + 2522.

It is an arithmetic number, because the mean of its divisors is an integer number (226176).

2^2138213 is an apocalyptic number.

It is an amenable number.

2138213 is a deficient number, since it is larger than the sum of its proper divisors (575899).

2138213 is a wasteful number, since it uses less digits than its factorization.

2138213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992 (or 3985 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 2138213 is about 1462.2629722454. The cubic root of 2138213 is about 128.8299945897.

Subtracting 2138213 from its reverse (3128312), we obtain a palindrome (990099).

The spelling of 2138213 in words is "two million, one hundred thirty-eight thousand, two hundred thirteen".