217395 has 12 divisors (see below), whose sum is σ = 376896. Its totient is φ = 115920.

The previous prime is 217387. The next prime is 217397. The reversal of 217395 is 593712.

217395 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 217395 - 2³ = 217387 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (217397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2371 + ... + 2460.

It is an arithmetic number, because the mean of its divisors is an integer number (31408).

2²¹⁷³⁹⁵ is an apocalyptic number.

217395 is a deficient number, since it is larger than the sum of its proper divisors (159501).

217395 is a wasteful number, since it uses less digits than its factorization.

217395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4842 (or 4839 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 217395 is about 466.2563672487. The cubic root of 217395 is about 60.1288895930.

The spelling of 217395 in words is "two hundred seventeen thousand, three hundred ninety-five".