16243563 has 16 divisors (see below), whose sum is σ = 24986880. Its totient is φ = 9194016.

The previous prime is 16243559. The next prime is 16243573. The reversal of 16243563 is 36534261.

It is not a de Polignac number, because 16243563 - 2² = 16243559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16243563.

It is not an unprimeable number, because it can be changed into a prime (16243553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1368 + ... + 5861.

It is an arithmetic number, because the mean of its divisors is an integer number (1561680).

Almost surely, 2^16243563 is an apocalyptic number.

16243563 is a deficient number, since it is larger than the sum of its proper divisors (8743317).

16243563 is a wasteful number, since it uses less digits than its factorization.

16243563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7346.

The product of its digits is 12960, while the sum is 30.

The square root of 16243563 is about 4030.3303834797. The cubic root of 16243563 is about 253.2564018863.

The spelling of 16243563 in words is "sixteen million, two hundred forty-three thousand, five hundred sixty-three".