16613217 has 6 divisors (see below), whose sum is σ = 23996882. Its totient is φ = 11075472.

The previous prime is 16613213. The next prime is 16613227. The reversal of 16613217 is 71231661.

It can be written as a sum of positive squares in only one way, i.e., 13242321 + 3370896 = 3639^2 + 1836^2 .

It is not a de Polignac number, because 16613217 - 2² = 16613213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16613213) 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 5 ways as a sum of consecutive naturals, for example, 922948 + ... + 922965.

Almost surely, 2^16613217 is an apocalyptic number.

It is an amenable number.

16613217 is a deficient number, since it is larger than the sum of its proper divisors (7383665).

16613217 is a wasteful number, since it uses less digits than its factorization.

16613217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845919 (or 1845916 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 16613217 is about 4075.9314272936. The cubic root of 16613217 is about 255.1631251526.

Adding to 16613217 its reverse (71231661), we get a palindrome (87844878).

The spelling of 16613217 in words is "sixteen million, six hundred thirteen thousand, two hundred seventeen".