231012340 has 48 divisors (see below), whose sum is σ = 534619008. Its totient is φ = 83309184.

The previous prime is 231012283. The next prime is 231012367. The reversal of 231012340 is 43210132.

It is a happy number.

231012340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849 + ... + 21511.

It is an arithmetic number, because the mean of its divisors is an integer number (11137896).

Almost surely, 2^231012340 is an apocalyptic number.

231012340 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 231012340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267309504).

231012340 is an abundant number, since it is smaller than the sum of its proper divisors (303606668).

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

231012340 is a wasteful number, since it uses less digits than its factorization.

231012340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20728 (or 20726 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231012340 is about 15199.0901043451. The cubic root of 231012340 is about 613.5901695550.

Adding to 231012340 its reverse (43210132), we get a palindrome (274222472).

The spelling of 231012340 in words is "two hundred thirty-one million, twelve thousand, three hundred forty".