16563243 has 8 divisors (see below), whose sum is σ = 23044608. Its totient is φ = 10562024.

The previous prime is 16563187. The next prime is 16563257. The reversal of 16563243 is 34236561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16563243 - 2⁶ = 16563179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16563243.

It is not an unprimeable number, because it can be changed into a prime (16563143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119955 + ... + 120092.

It is an arithmetic number, because the mean of its divisors is an integer number (2880576).

Almost surely, 2^16563243 is an apocalyptic number.

16563243 is a deficient number, since it is larger than the sum of its proper divisors (6481365).

16563243 is a wasteful number, since it uses less digits than its factorization.

16563243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240073.

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

The square root of 16563243 is about 4069.7964322555. The cubic root of 16563243 is about 254.9070172332.

The spelling of 16563243 in words is "sixteen million, five hundred sixty-three thousand, two hundred forty-three".