2138131 has 4 divisors (see below), whose sum is σ = 2141064. Its totient is φ = 2135200.

The previous prime is 2138093. The next prime is 2138137. The reversal of 2138131 is 1318312.

It is a semiprime because it is the product of two primes, 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 2138131 - 2¹¹ = 2136083 is a prime.

It is a super-2 number, since 2×2138131² = 9143208346322, which contains 22 as substring.

It is a Duffinian number.

2138131 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2138099 and 2138108.

It is not an unprimeable number, because it can be changed into a prime (2138137) 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, 576 + ... + 2146.

It is an arithmetic number, because the mean of its divisors is an integer number (535266).

2^2138131 is an apocalyptic number.

2138131 is a deficient number, since it is larger than the sum of its proper divisors (2933).

2138131 is a wasteful number, since it uses less digits than its factorization.

2138131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932.

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

The square root of 2138131 is about 1462.2349332443. The cubic root of 2138131 is about 128.8283477013.

It can be divided in two parts, 21381 and 31, that added together give a palindrome (21412).

The spelling of 2138131 in words is "two million, one hundred thirty-eight thousand, one hundred thirty-one".