217159 has 4 divisors (see below), whose sum is σ = 218104. Its totient is φ = 216216.

The previous prime is 217157. The next prime is 217163. The reversal of 217159 is 951712.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 217159 - 2¹ = 217157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124 + ... + 670.

It is an arithmetic number, because the mean of its divisors is an integer number (54526).

2²¹⁷¹⁵⁹ is an apocalyptic number.

217159 is a deficient number, since it is larger than the sum of its proper divisors (945).

217159 is an equidigital number, since it uses as much as digits as its factorization.

217159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944.

The product of its digits is 630, while the sum is 25.

The square root of 217159 is about 466.0032188730. The cubic root of 217159 is about 60.1071234438.

It can be divided in two parts, 2 and 17159, that added together give a square (17161 = 131²).

The spelling of 217159 in words is "two hundred seventeen thousand, one hundred fifty-nine".