231243456 has 56 divisors (see below), whose sum is σ = 613379520. Its totient is φ = 76886272.

The previous prime is 231243443. The next prime is 231243457. The reversal of 231243456 is 654342132.

231243456 is digitally balanced in base 2, 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 (231243457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88375 + ... + 90953.

Almost surely, 2^231243456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231243456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306689760).

231243456 is an abundant number, since it is smaller than the sum of its proper divisors (382136064).

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

231243456 is a wasteful number, since it uses less digits than its factorization.

231243456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061 (or 3051 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 231243456 is about 15206.6911588287. The cubic root of 231243456 is about 613.7947231884.

Adding to 231243456 its reverse (654342132), we get a palindrome (885585588).

The spelling of 231243456 in words is "two hundred thirty-one million, two hundred forty-three thousand, four hundred fifty-six".