243440230431 has 8 divisors (see below), whose sum is σ = 324667712944. Its totient is φ = 162253117440.

The previous prime is 243440230417. The next prime is 243440230457. The reversal of 243440230431 is 134032044342.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243440230431 - 2⁵ = 243440230399 is a prime.

It is a super-2 number, since 2×243440230431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243440270431) 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, 10078306 + ... + 10102431.

It is an arithmetic number, because the mean of its divisors is an integer number (40583464118).

Almost surely, 2^243440230431 is an apocalyptic number.

243440230431 is a deficient number, since it is larger than the sum of its proper divisors (81227482513).

243440230431 is a wasteful number, since it uses less digits than its factorization.

243440230431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20184761.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 243440230431 its reverse (134032044342), we get a palindrome (377472274773).

The spelling of 243440230431 in words is "two hundred forty-three billion, four hundred forty million, two hundred thirty thousand, four hundred thirty-one".