158217 has 8 divisors (see below), whose sum is σ = 220224. Its totient is φ = 100848.

The previous prime is 158209. The next prime is 158227. The reversal of 158217 is 712851.

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

It is not a de Polignac number, because 158217 - 2³ = 158209 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

158217 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (158227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078 + ... + 1215.

It is an arithmetic number, because the mean of its divisors is an integer number (27528).

2¹⁵⁸²¹⁷ is an apocalyptic number.

It is an amenable number.

158217 is a deficient number, since it is larger than the sum of its proper divisors (62007).

158217 is a wasteful number, since it uses less digits than its factorization.

158217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319.

The product of its digits is 560, while the sum is 24.

The square root of 158217 is about 397.7650060023. The cubic root of 158217 is about 54.0859399732.

The spelling of 158217 in words is "one hundred fifty-eight thousand, two hundred seventeen".