2043521563 has 2 divisors, whose sum is σ = 2043521564. Its totient is φ = 2043521562.

The previous prime is 2043521539. The next prime is 2043521591. The reversal of 2043521563 is 3651253402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2043521563 - 2²⁵ = 2009967131 is a prime.

It is not a weakly prime, because it can be changed into another prime (2043528563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021760781 + 1021760782.

It is an arithmetic number, because the mean of its divisors is an integer number (1021760782).

Almost surely, 2^2043521563 is an apocalyptic number.

2043521563 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043521563 is an equidigital number, since it uses as much as digits as its factorization.

2043521563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 2043521563 is about 45205.3267104663. The cubic root of 2043521563 is about 1268.9945051420.

Adding to 2043521563 its reverse (3651253402), we get a palindrome (5694774965).

The spelling of 2043521563 in words is "two billion, forty-three million, five hundred twenty-one thousand, five hundred sixty-three".