16651317 has 4 divisors (see below), whose sum is σ = 22201760. Its totient is φ = 11100876.

The previous prime is 16651303. The next prime is 16651331. The reversal of 16651317 is 71315661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (16651303) and next prime (16651331).

It is not a de Polignac number, because 16651317 - 2⁶ = 16651253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651337) 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 3 ways as a sum of consecutive naturals, for example, 2775217 + ... + 2775222.

It is an arithmetic number, because the mean of its divisors is an integer number (5550440).

Almost surely, 2^16651317 is an apocalyptic number.

It is an amenable number.

16651317 is a deficient number, since it is larger than the sum of its proper divisors (5550443).

16651317 is an equidigital number, since it uses as much as digits as its factorization.

16651317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550442.

The product of its digits is 3780, while the sum is 30.

The square root of 16651317 is about 4080.6025290391. The cubic root of 16651317 is about 255.3580360829.

Adding to 16651317 its reverse (71315661), we get a palindrome (87966978).

The spelling of 16651317 in words is "sixteen million, six hundred fifty-one thousand, three hundred seventeen".