2043521539 has 2 divisors, whose sum is σ = 2043521540. Its totient is φ = 2043521538.

The previous prime is 2043521537. The next prime is 2043521563. The reversal of 2043521539 is 9351253402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2043521539 - 2¹ = 2043521537 is a prime.

Together with 2043521537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2043521537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021760769 + 1021760770.

It is an arithmetic number, because the mean of its divisors is an integer number (1021760770).

Almost surely, 2^2043521539 is an apocalyptic number.

2043521539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043521539 is an equidigital number, since it uses as much as digits as its factorization.

2043521539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 2043521539 is about 45205.3264450109. The cubic root of 2043521539 is about 1268.9945001742.

The spelling of 2043521539 in words is "two billion, forty-three million, five hundred twenty-one thousand, five hundred thirty-nine".