2005442543 has 4 divisors (see below), whose sum is σ = 2159707368. Its totient is φ = 1851177720.

The previous prime is 2005442503. The next prime is 2005442563. The reversal of 2005442543 is 3452445002.

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

It is a cyclic number.

It is not a de Polignac number, because 2005442543 - 2¹⁰ = 2005441519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005442503) 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, 77132393 + ... + 77132418.

It is an arithmetic number, because the mean of its divisors is an integer number (539926842).

Almost surely, 2^2005442543 is an apocalyptic number.

2005442543 is a deficient number, since it is larger than the sum of its proper divisors (154264825).

2005442543 is a wasteful number, since it uses less digits than its factorization.

2005442543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154264824.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 2005442543 is about 44782.1676898294. The cubic root of 2005442543 is about 1261.0628771948.

Adding to 2005442543 its reverse (3452445002), we get a palindrome (5457887545).

The spelling of 2005442543 in words is "two billion, five million, four hundred forty-two thousand, five hundred forty-three".