2040431243 has 4 divisors (see below), whose sum is σ = 2050788960. Its totient is φ = 2030073528.

The previous prime is 2040431219. The next prime is 2040431291. The reversal of 2040431243 is 3421340402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2040431243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2040431143) 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, 5178563 + ... + 5178956.

It is an arithmetic number, because the mean of its divisors is an integer number (512697240).

Almost surely, 2^2040431243 is an apocalyptic number.

2040431243 is a deficient number, since it is larger than the sum of its proper divisors (10357717).

2040431243 is a wasteful number, since it uses less digits than its factorization.

2040431243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10357716.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2040431243 is about 45171.1328505274. The cubic root of 2040431243 is about 1268.3545025034.

Adding to 2040431243 its reverse (3421340402), we get a palindrome (5461771645).

The spelling of 2040431243 in words is "two billion, forty million, four hundred thirty-one thousand, two hundred forty-three".