231938 has 8 divisors (see below), whose sum is σ = 397632. Its totient is φ = 99396.

The previous prime is 231923. The next prime is 231943. The reversal of 231938 is 839132.

231938 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an Ulam number.

It is an unprimeable number.

231938 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8270 + ... + 8297.

It is an arithmetic number, because the mean of its divisors is an integer number (49704).

2²³¹⁹³⁸ is an apocalyptic number.

231938 is a deficient number, since it is larger than the sum of its proper divisors (165694).

231938 is a wasteful number, since it uses less digits than its factorization.

231938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16576.

The product of its digits is 1296, while the sum is 26.

The square root of 231938 is about 481.5994186043. The cubic root of 231938 is about 61.4408623581.

The spelling of 231938 in words is "two hundred thirty-one thousand, nine hundred thirty-eight".