231942 has 32 divisors (see below), whose sum is σ = 506880. Its totient is φ = 70560.

The previous prime is 231923. The next prime is 231943. The reversal of 231942 is 249132.

Its product of digits (432) is a multiple of the sum of its prime divisors (108).

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231943) by changing a digit.

231942 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 (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5373 + ... + 5415.

It is an arithmetic number, because the mean of its divisors is an integer number (15840).

2²³¹⁹⁴² is an apocalyptic number.

231942 is an abundant number, since it is smaller than the sum of its proper divisors (274938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231942 is a wasteful number, since it uses less digits than its factorization.

231942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108.

The product of its digits is 432, while the sum is 21.

The square root of 231942 is about 481.6035714153. The cubic root of 231942 is about 61.4412155589.

The spelling of 231942 in words is "two hundred thirty-one thousand, nine hundred forty-two".