2101604563 has 2 divisors, whose sum is σ = 2101604564. Its totient is φ = 2101604562.

The previous prime is 2101604539. The next prime is 2101604579. The reversal of 2101604563 is 3654061012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2101604563 - 2⁹ = 2101604051 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101604503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050802281 + 1050802282.

It is an arithmetic number, because the mean of its divisors is an integer number (1050802282).

Almost surely, 2^2101604563 is an apocalyptic number.

2101604563 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101604563 is an equidigital number, since it uses as much as digits as its factorization.

2101604563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2101604563 is about 45843.2608242477. The cubic root of 2101604563 is about 1280.9052359136.

Adding to 2101604563 its reverse (3654061012), we get a palindrome (5755665575).

The spelling of 2101604563 in words is "two billion, one hundred one million, six hundred four thousand, five hundred sixty-three".