216284565 has 32 divisors (see below), whose sum is σ = 396815616. Its totient is φ = 98542080.

The previous prime is 216284533. The next prime is 216284569. The reversal of 216284565 is 565482612.

It is not a de Polignac number, because 216284565 - 2⁵ = 216284533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216284569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29575 + ... + 36155.

It is an arithmetic number, because the mean of its divisors is an integer number (12400488).

Almost surely, 2^216284565 is an apocalyptic number.

It is an amenable number.

216284565 is a deficient number, since it is larger than the sum of its proper divisors (180531051).

216284565 is a wasteful number, since it uses less digits than its factorization.

216284565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6909.

The product of its digits is 115200, while the sum is 39.

The square root of 216284565 is about 14706.6163681521. The cubic root of 216284565 is about 600.2633704875.

The spelling of 216284565 in words is "two hundred sixteen million, two hundred eighty-four thousand, five hundred sixty-five".