158111 has 4 divisors (see below), whose sum is σ = 161832. Its totient is φ = 154392.

The previous prime is 158077. The next prime is 158113. The reversal of 158111 is 111851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111851 = 37 ⋅3023.

It is a cyclic number.

It is not a de Polignac number, because 158111 - 2⁶ = 158047 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 158111.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 158111.

It is not an unprimeable number, because it can be changed into a prime (158113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1796 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (40458).

2¹⁵⁸¹¹¹ is an apocalyptic number.

158111 is a deficient number, since it is larger than the sum of its proper divisors (3721).

158111 is an equidigital number, since it uses as much as digits as its factorization.

158111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720.

The product of its digits is 40, while the sum is 17.

The square root of 158111 is about 397.6317391758. The cubic root of 158111 is about 54.0738586957.

Adding to 158111 its reverse (111851), we get a palindrome (269962).

It can be divided in two parts, 1581 and 11, that multiplied together give a triangular number (17391 = T₁₈₆).

The spelling of 158111 in words is "one hundred fifty-eight thousand, one hundred eleven".