231442 has 8 divisors (see below), whose sum is σ = 351036. Its totient is φ = 114432.

The previous prime is 231433. The next prime is 231443. The reversal of 231442 is 244132.

It can be written as a sum of positive squares in 2 ways, for example, as 231361 + 81 = 481^2 + 9^2 .

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

It is not an unprimeable number, because it can be changed into a prime (231443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403 + ... + 790.

2²³¹⁴⁴² is an apocalyptic number.

231442 is a deficient number, since it is larger than the sum of its proper divisors (119594).

231442 is a wasteful number, since it uses less digits than its factorization.

231442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292.

The product of its digits is 192, while the sum is 16.

The square root of 231442 is about 481.0841922159. The cubic root of 231442 is about 61.3970339543.

Adding to 231442 its reverse (244132), we get a palindrome (475574).

The spelling of 231442 in words is "two hundred thirty-one thousand, four hundred forty-two".