216530365 has 16 divisors (see below), whose sum is σ = 276232320. Its totient is φ = 162475200.

The previous prime is 216530359. The next prime is 216530449. The reversal of 216530365 is 563035612.

It is not a de Polignac number, because 216530365 - 2³ = 216530357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1689 + ... + 20878.

It is an arithmetic number, because the mean of its divisors is an integer number (17264520).

Almost surely, 2^216530365 is an apocalyptic number.

It is an amenable number.

216530365 is a deficient number, since it is larger than the sum of its proper divisors (59701955).

216530365 is a wasteful number, since it uses less digits than its factorization.

216530365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22692.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 216530365 is about 14714.9707780886. The cubic root of 216530365 is about 600.4906773206.

Adding to 216530365 its reverse (563035612), we get a palindrome (779565977).

The spelling of 216530365 in words is "two hundred sixteen million, five hundred thirty thousand, three hundred sixty-five".