231142 has 4 divisors (see below), whose sum is σ = 346716. Its totient is φ = 115570.

The previous prime is 231131. The next prime is 231169. The reversal of 231142 is 241132.

231142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

231142 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 as a sum of consecutive naturals, namely, 57784 + ... + 57787.

It is an arithmetic number, because the mean of its divisors is an integer number (86679).

2²³¹¹⁴² is an apocalyptic number.

231142 is a deficient number, since it is larger than the sum of its proper divisors (115574).

231142 is a wasteful number, since it uses less digits than its factorization.

231142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115573.

The product of its digits is 48, while the sum is 13.

The square root of 231142 is about 480.7722953748. The cubic root of 231142 is about 61.3704944407.

Adding to 231142 its reverse (241132), we get a palindrome (472274).

It can be divided in two parts, 231 and 142, that added together give a palindrome (373).

The spelling of 231142 in words is "two hundred thirty-one thousand, one hundred forty-two".