158315 has 4 divisors (see below), whose sum is σ = 189984. Its totient is φ = 126648.

The previous prime is 158303. The next prime is 158329. The reversal of 158315 is 513851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158315 - 2¹⁰ = 157291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15827 + ... + 15836.

It is an arithmetic number, because the mean of its divisors is an integer number (47496).

2¹⁵⁸³¹⁵ is an apocalyptic number.

158315 is a deficient number, since it is larger than the sum of its proper divisors (31669).

158315 is an equidigital number, since it uses as much as digits as its factorization.

158315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31668.

The product of its digits is 600, while the sum is 23.

The square root of 158315 is about 397.8881752453. Note that the first 3 decimals coincide. The cubic root of 158315 is about 54.0971046565.

It can be divided in two parts, 158 and 315, that multiplied together give a triangular number (49770 = T₃₁₅).

The spelling of 158315 in words is "one hundred fifty-eight thousand, three hundred fifteen".