231958 has 4 divisors (see below), whose sum is σ = 347940. Its totient is φ = 115978.

The previous prime is 231947. The next prime is 231961. The reversal of 231958 is 859132.

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

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57988 + ... + 57991.

It is an arithmetic number, because the mean of its divisors is an integer number (86985).

2²³¹⁹⁵⁸ is an apocalyptic number.

231958 is a deficient number, since it is larger than the sum of its proper divisors (115982).

231958 is a wasteful number, since it uses less digits than its factorization.

231958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115981.

The product of its digits is 2160, while the sum is 28.

The square root of 231958 is about 481.6201823014. The cubic root of 231958 is about 61.4426283214.

The spelling of 231958 in words is "two hundred thirty-one thousand, nine hundred fifty-eight".