16605213 has 8 divisors (see below), whose sum is σ = 22471008. Its totient is φ = 10904784.

The previous prime is 16605203. The next prime is 16605217. The reversal of 16605213 is 31250661.

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

It is not a de Polignac number, because 16605213 - 2⁹ = 16604701 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16605217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41106 + ... + 41507.

It is an arithmetic number, because the mean of its divisors is an integer number (2808876).

Almost surely, 2^16605213 is an apocalyptic number.

It is an amenable number.

16605213 is a deficient number, since it is larger than the sum of its proper divisors (5865795).

16605213 is an equidigital number, since it uses as much as digits as its factorization.

16605213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82683.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 16605213 is about 4074.9494475392. The cubic root of 16605213 is about 255.1221406416.

Adding to 16605213 its reverse (31250661), we get a palindrome (47855874).

The spelling of 16605213 in words is "sixteen million, six hundred five thousand, two hundred thirteen".