231243342 has 48 divisors (see below), whose sum is σ = 510209280. Its totient is φ = 69818320.

The previous prime is 231243329. The next prime is 231243347. The reversal of 231243342 is 243342132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231243347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321259 + ... + 321977.

It is an arithmetic number, because the mean of its divisors is an integer number (10629360).

Almost surely, 2^231243342 is an apocalyptic number.

231243342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 231243342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255104640).

231243342 is an abundant number, since it is smaller than the sum of its proper divisors (278965938).

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

231243342 is a wasteful number, since it uses less digits than its factorization.

231243342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189 (or 1178 counting only the distinct ones).

The product of its digits is 3456, while the sum is 24.

The square root of 231243342 is about 15206.6874104783. The cubic root of 231243342 is about 613.7946223241.

Adding to 231243342 its reverse (243342132), we get a palindrome (474585474).

It can be divided in two parts, 2312 and 43342, that added together give a palindrome (45654).

The spelling of 231243342 in words is "two hundred thirty-one million, two hundred forty-three thousand, three hundred forty-two".