2043521543 has 4 divisors (see below), whose sum is σ = 2335453200. Its totient is φ = 1751589888.

The previous prime is 2043521539. The next prime is 2043521563. The reversal of 2043521543 is 3451253402.

It is a happy number.

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 2043521543 - 2² = 2043521539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043521563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145965818 + ... + 145965831.

It is an arithmetic number, because the mean of its divisors is an integer number (583863300).

Almost surely, 2^2043521543 is an apocalyptic number.

2043521543 is a deficient number, since it is larger than the sum of its proper divisors (291931657).

2043521543 is an equidigital number, since it uses as much as digits as its factorization.

2043521543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291931656.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 2043521543 is about 45205.3264892535. The cubic root of 2043521543 is about 1268.9945010021.

Adding to 2043521543 its reverse (3451253402), we get a palindrome (5494774945).

The spelling of 2043521543 in words is "two billion, forty-three million, five hundred twenty-one thousand, five hundred forty-three".