16717216 has 12 divisors (see below), whose sum is σ = 32912082. Its totient is φ = 8358592.

The previous prime is 16717213. The next prime is 16717231. The reversal of 16717216 is 61271761.

It can be written as a sum of positive squares in only one way, i.e., 10265616 + 6451600 = 3204^2 + 2540^2 .

It is not an unprimeable number, because it can be changed into a prime (16717213) 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 as a sum of consecutive naturals, namely, 261175 + ... + 261238.

Almost surely, 2^16717216 is an apocalyptic number.

16717216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16717216 is a deficient number, since it is larger than the sum of its proper divisors (16194866).

16717216 is an equidigital number, since it uses as much as digits as its factorization.

16717216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522423 (or 522415 counting only the distinct ones).

The product of its digits is 3528, while the sum is 31.

The square root of 16717216 is about 4088.6692211525. The cubic root of 16717216 is about 255.6944596963.

Adding to 16717216 its reverse (61271761), we get a palindrome (77988977).

The spelling of 16717216 in words is "sixteen million, seven hundred seventeen thousand, two hundred sixteen".