16503223 has 4 divisors (see below), whose sum is σ = 18003528. Its totient is φ = 15002920.

The previous prime is 16503211. The next prime is 16503241. The reversal of 16503223 is 32230561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16503223 - 2¹⁷ = 16372151 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16503194 and 16503203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16503203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750136 + ... + 750157.

It is an arithmetic number, because the mean of its divisors is an integer number (4500882).

Almost surely, 2^16503223 is an apocalyptic number.

16503223 is a deficient number, since it is larger than the sum of its proper divisors (1500305).

16503223 is a wasteful number, since it uses less digits than its factorization.

16503223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500304.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 16503223 is about 4062.4159068219. The cubic root of 16503223 is about 254.5987435317.

Adding to 16503223 its reverse (32230561), we get a palindrome (48733784).

The spelling of 16503223 in words is "sixteen million, five hundred three thousand, two hundred twenty-three".