16217065 has 16 divisors (see below), whose sum is σ = 20820240. Its totient is φ = 12083200.

The previous prime is 16217029. The next prime is 16217081. The reversal of 16217065 is 56071261.

It can be written as a sum of positive squares in 8 ways, for example, as 2019241 + 14197824 = 1421^2 + 3768^2 .

It is not a de Polignac number, because 16217065 - 2¹³ = 16208873 is a prime.

It is a super-3 number, since 3×16217065³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7641 + ... + 9529.

It is an arithmetic number, because the mean of its divisors is an integer number (1301265).

Almost surely, 2^16217065 is an apocalyptic number.

It is an amenable number.

16217065 is a deficient number, since it is larger than the sum of its proper divisors (4603175).

16217065 is a wasteful number, since it uses less digits than its factorization.

16217065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 16217065 is about 4027.0417181847. The cubic root of 16217065 is about 253.1186151923.

The spelling of 16217065 in words is "sixteen million, two hundred seventeen thousand, sixty-five".