2138431 has 8 divisors (see below), whose sum is σ = 2329200. Its totient is φ = 1955520.

The previous prime is 2138429. The next prime is 2138467. The reversal of 2138431 is 1348312.

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

It is a cyclic number.

It is not a de Polignac number, because 2138431 - 2¹ = 2138429 is a prime.

It is a super-2 number, since 2×2138431² = 9145774283522, 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 (2138401) 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, 1390 + ... + 2491.

It is an arithmetic number, because the mean of its divisors is an integer number (291150).

2^2138431 is an apocalyptic number.

2138431 is a deficient number, since it is larger than the sum of its proper divisors (190769).

2138431 is a wasteful number, since it uses less digits than its factorization.

2138431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929.

The product of its digits is 576, while the sum is 22.

The square root of 2138431 is about 1462.3375123411. The cubic root of 2138431 is about 128.8343726980.

The spelling of 2138431 in words is "two million, one hundred thirty-eight thousand, four hundred thirty-one".