231158 has 8 divisors (see below), whose sum is σ = 355320. Its totient is φ = 112720.

The previous prime is 231131. The next prime is 231169. The reversal of 231158 is 851132.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

231158 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 1328 + ... + 1491.

It is an arithmetic number, because the mean of its divisors is an integer number (44415).

2²³¹¹⁵⁸ is an apocalyptic number.

231158 is a deficient number, since it is larger than the sum of its proper divisors (124162).

231158 is a wasteful number, since it uses less digits than its factorization.

231158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862.

The product of its digits is 240, while the sum is 20.

The square root of 231158 is about 480.7889349808. The cubic root of 231158 is about 61.3719104610.

The spelling of 231158 in words is "two hundred thirty-one thousand, one hundred fifty-eight".