2043542431 has 4 divisors (see below), whose sum is σ = 2335477072. Its totient is φ = 1751607792.

The previous prime is 2043542429. The next prime is 2043542441. The reversal of 2043542431 is 1342453402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1342453402 = 2 ⋅671226701.

It is a cyclic number.

It is not a de Polignac number, because 2043542431 - 2¹ = 2043542429 is a prime.

It is a super-2 number, since 2×2043542431² = 8352131334594779522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2043542431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043542401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145967310 + ... + 145967323.

It is an arithmetic number, because the mean of its divisors is an integer number (583869268).

Almost surely, 2^2043542431 is an apocalyptic number.

2043542431 is a deficient number, since it is larger than the sum of its proper divisors (291934641).

2043542431 is an equidigital number, since it uses as much as digits as its factorization.

2043542431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291934640.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 2043542431 is about 45205.5575233842. The cubic root of 2043542431 is about 1268.9988246931.

Adding to 2043542431 its reverse (1342453402), we get a palindrome (3385995833).

The spelling of 2043542431 in words is "two billion, forty-three million, five hundred forty-two thousand, four hundred thirty-one".