2138311 has 18 divisors (see below), whose sum is σ = 2659848. Its totient is φ = 1713600.

The previous prime is 2138291. The next prime is 2138321. The reversal of 2138311 is 1138312.

It is not a de Polignac number, because 2138311 - 2¹⁹ = 1614023 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 (2138321) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14086 + ... + 14236.

2^2138311 is an apocalyptic number.

2138311 is a deficient number, since it is larger than the sum of its proper divisors (521537).

2138311 is a wasteful number, since it uses less digits than its factorization.

2138311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 175 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 2138311 is about 1462.2964815659. The cubic root of 2138311 is about 128.8319627670.

Subtracting from 2138311 its reverse (1138312), we obtain a palindrome (999999).

The spelling of 2138311 in words is "two million, one hundred thirty-eight thousand, three hundred eleven".