216395 has 8 divisors (see below), whose sum is σ = 262656. Its totient is φ = 171136.

The previous prime is 216379. The next prime is 216397. The reversal of 216395 is 593612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216395 - 2⁴ = 216379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374 + ... + 756.

It is an arithmetic number, because the mean of its divisors is an integer number (32832).

2²¹⁶³⁹⁵ is an apocalyptic number.

216395 is a deficient number, since it is larger than the sum of its proper divisors (46261).

216395 is a wasteful number, since it uses less digits than its factorization.

216395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its digits is 1620, while the sum is 26.

The square root of 216395 is about 465.1827597837. The cubic root of 216395 is about 60.0365518023.

The spelling of 216395 in words is "two hundred sixteen thousand, three hundred ninety-five".