216502165 has 16 divisors (see below), whose sum is σ = 284106816. Its totient is φ = 157075200.

The previous prime is 216502147. The next prime is 216502183. The reversal of 216502165 is 561205612.

It is an interprime number because it is at equal distance from previous prime (216502147) and next prime (216502183).

It is not a de Polignac number, because 216502165 - 2⁷ = 216502037 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 19270 + ... + 28360.

It is an arithmetic number, because the mean of its divisors is an integer number (17756676).

Almost surely, 2^216502165 is an apocalyptic number.

It is an amenable number.

216502165 is a deficient number, since it is larger than the sum of its proper divisors (67604651).

216502165 is a wasteful number, since it uses less digits than its factorization.

216502165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9540.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 216502165 is about 14714.0125390731. The cubic root of 216502165 is about 600.4646077325.

Adding to 216502165 its reverse (561205612), we get a palindrome (777707777).

The spelling of 216502165 in words is "two hundred sixteen million, five hundred two thousand, one hundred sixty-five".