216346165 has 32 divisors (see below), whose sum is σ = 327836160. Its totient is φ = 133545984.

The previous prime is 216346121. The next prime is 216346171. The reversal of 216346165 is 561643612.

It is a cyclic number.

It is not a de Polignac number, because 216346165 - 2¹⁵ = 216313397 is a prime.

It is a super-2 number, since 2×216346165² = 93611326220414450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216346165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5781 + ... + 21589.

It is an arithmetic number, because the mean of its divisors is an integer number (10244880).

Almost surely, 2^216346165 is an apocalyptic number.

It is an amenable number.

216346165 is a deficient number, since it is larger than the sum of its proper divisors (111489995).

216346165 is a wasteful number, since it uses less digits than its factorization.

216346165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15861.

The product of its digits is 25920, while the sum is 34.

The square root of 216346165 is about 14708.7105145217. The cubic root of 216346165 is about 600.3203520753.

Adding to 216346165 its reverse (561643612), we get a palindrome (777989777).

The spelling of 216346165 in words is "two hundred sixteen million, three hundred forty-six thousand, one hundred sixty-five".