216265 has 16 divisors (see below), whose sum is σ = 306432. Its totient is φ = 143424.

The previous prime is 216263. The next prime is 216289. The reversal of 216265 is 562612.

216265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 216265 - 2¹ = 216263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1212 + ... + 1378.

It is an arithmetic number, because the mean of its divisors is an integer number (19152).

2²¹⁶²⁶⁵ is an apocalyptic number.

It is an amenable number.

216265 is a deficient number, since it is larger than the sum of its proper divisors (90167).

216265 is a wasteful number, since it uses less digits than its factorization.

216265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216.

The product of its digits is 720, while the sum is 22.

The square root of 216265 is about 465.0430087637. The cubic root of 216265 is about 60.0245270094.

Adding to 216265 its reverse (562612), we get a palindrome (778877).

The spelling of 216265 in words is "two hundred sixteen thousand, two hundred sixty-five".