16504223 has 2 divisors, whose sum is σ = 16504224. Its totient is φ = 16504222.

The previous prime is 16504211. The next prime is 16504273. The reversal of 16504223 is 32240561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16504223 - 2⁴ = 16504207 is a prime.

It is a Sophie Germain prime.

It is equal to p_1061447 and since 16504223 and 1061447 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16504273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252111 + 8252112.

It is an arithmetic number, because the mean of its divisors is an integer number (8252112).

Almost surely, 2^16504223 is an apocalyptic number.

16504223 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504223 is an equidigital number, since it uses as much as digits as its factorization.

16504223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 16504223 is about 4062.5389844283. The cubic root of 16504223 is about 254.6038858323.

Adding to 16504223 its reverse (32240561), we get a palindrome (48744784).

The spelling of 16504223 in words is "sixteen million, five hundred four thousand, two hundred twenty-three".