158317 has 4 divisors (see below), whose sum is σ = 163456. Its totient is φ = 153180.

The previous prime is 158303. The next prime is 158329. The reversal of 158317 is 713851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158317 - 2⁷ = 158189 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 158291 and 158300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158357) 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, 2523 + ... + 2584.

It is an arithmetic number, because the mean of its divisors is an integer number (40864).

2¹⁵⁸³¹⁷ is an apocalyptic number.

It is an amenable number.

158317 is a deficient number, since it is larger than the sum of its proper divisors (5139).

158317 is an equidigital number, since it uses as much as digits as its factorization.

158317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138.

The product of its digits is 840, while the sum is 25.

The square root of 158317 is about 397.8906885063. The cubic root of 158317 is about 54.0973324592.

It can be divided in two parts, 1583 and 17, that added together give a square (1600 = 40²).

The spelling of 158317 in words is "one hundred fifty-eight thousand, three hundred seventeen".