231443142 has 128 divisors (see below), whose sum is σ = 588211200. Its totient is φ = 59222016.

The previous prime is 231443141. The next prime is 231443153. The reversal of 231443142 is 241344132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231443141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1689298 + ... + 1689434.

It is an arithmetic number, because the mean of its divisors is an integer number (4595400).

Almost surely, 2^231443142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231443142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294105600).

231443142 is an abundant number, since it is smaller than the sum of its proper divisors (356768058).

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

231443142 is a wasteful number, since it uses less digits than its factorization.

231443142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270.

The product of its digits is 2304, while the sum is 24.

The square root of 231443142 is about 15213.2554701484. The cubic root of 231443142 is about 613.9713493759.

Adding to 231443142 its reverse (241344132), we get a palindrome (472787274).

The spelling of 231443142 in words is "two hundred thirty-one million, four hundred forty-three thousand, one hundred forty-two".