216327765 has 64 divisors (see below), whose sum is σ = 378224640. Its totient is φ = 105262080.

The previous prime is 216327763. The next prime is 216327773. The reversal of 216327765 is 567723612.

It is not a de Polignac number, because 216327765 - 2¹ = 216327763 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216327763) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1208446 + ... + 1208624.

It is an arithmetic number, because the mean of its divisors is an integer number (5909760).

Almost surely, 2^216327765 is an apocalyptic number.

It is an amenable number.

216327765 is a deficient number, since it is larger than the sum of its proper divisors (161896875).

216327765 is a wasteful number, since it uses less digits than its factorization.

216327765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354.

The product of its digits is 105840, while the sum is 39.

The square root of 216327765 is about 14708.0850215111. The cubic root of 216327765 is about 600.3033327340.

The spelling of 216327765 in words is "two hundred sixteen million, three hundred twenty-seven thousand, seven hundred sixty-five".