16001563 has 4 divisors (see below), whose sum is σ = 16009840. Its totient is φ = 15993288.

The previous prime is 16001551. The next prime is 16001593. The reversal of 16001563 is 36510061.

16001563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16001563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16001593) 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, 481 + ... + 5677.

It is an arithmetic number, because the mean of its divisors is an integer number (4002460).

Almost surely, 2^16001563 is an apocalyptic number.

16001563 is a deficient number, since it is larger than the sum of its proper divisors (8277).

16001563 is an equidigital number, since it uses as much as digits as its factorization.

16001563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8276.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 16001563 is about 4000.1953702288. The cubic root of 16001563 is about 251.9924149476.

The spelling of 16001563 in words is "sixteen million, one thousand, five hundred sixty-three".