231340420 has 48 divisors (see below), whose sum is σ = 519281280. Its totient is φ = 86265344.

The previous prime is 231340397. The next prime is 231340429. The reversal of 231340420 is 24043132.

231340420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231340429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33201 + ... + 39559.

It is an arithmetic number, because the mean of its divisors is an integer number (10818360).

Almost surely, 2^231340420 is an apocalyptic number.

231340420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231340420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259640640).

231340420 is an abundant number, since it is smaller than the sum of its proper divisors (287940860).

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

231340420 is a wasteful number, since it uses less digits than its factorization.

231340420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6492 (or 6490 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 231340420 is about 15209.8790264749. The cubic root of 231340420 is about 613.8805024444.

Adding to 231340420 its reverse (24043132), we get a palindrome (255383552).

The spelling of 231340420 in words is "two hundred thirty-one million, three hundred forty thousand, four hundred twenty".