231842 has 16 divisors (see below), whose sum is σ = 386232. Its totient is φ = 103680.

The previous prime is 231841. The next prime is 231859. The reversal of 231842 is 248132.

It can be written as a sum of positive squares in 4 ways, for example, as 219961 + 11881 = 469^2 + 109^2 .

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 231842.

It is not an unprimeable number, because it can be changed into a prime (231841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842 + ... + 1082.

2²³¹⁸⁴² is an apocalyptic number.

It is a pronic number, being equal to 481×482.

231842 is a deficient number, since it is larger than the sum of its proper divisors (154390).

231842 is a wasteful number, since it uses less digits than its factorization.

231842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293.

The product of its digits is 384, while the sum is 20.

The square root of 231842 is about 481.4997403945. The cubic root of 231842 is about 61.4323843213.

Adding to 231842 its reverse (248132), we get a palindrome (479974).

Subtracting 231842 from its reverse (248132), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 231842 in words is "two hundred thirty-one thousand, eight hundred forty-two".