231243131203424 has 24 divisors (see below), whose sum is σ = 460744973773560. Its totient is φ = 114228534689536.

The previous prime is 231243131203379. The next prime is 231243131203471. The reversal of 231243131203424 is 424302131342132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43532213309 + ... + 43532218620.

It is an arithmetic number, because the mean of its divisors is an integer number (19197707240565).

Almost surely, 2^{231243131203424} is an apocalyptic number.

It is an amenable number.

231243131203424 is a deficient number, since it is larger than the sum of its proper divisors (229501842570136).

231243131203424 is an equidigital number, since it uses as much as digits as its factorization.

231243131203424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87064432022 (or 87064432014 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 231243131203424 its reverse (424302131342132), we get a palindrome (655545262545556).

The spelling of 231243131203424 in words is "two hundred thirty-one trillion, two hundred forty-three billion, one hundred thirty-one million, two hundred three thousand, four hundred twenty-four".