243243134431 has 8 divisors (see below), whose sum is σ = 266703134544. Its totient is φ = 220007632320.

The previous prime is 243243134423. The next prime is 243243134437. The reversal of 243243134431 is 134431342342.

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

It is a cyclic number.

It is not a de Polignac number, because 243243134431 - 2³ = 243243134423 is a prime.

It is a super-2 number, since 2×243243134431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243243134437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56122230 + ... + 56126563.

It is an arithmetic number, because the mean of its divisors is an integer number (33337891818).

Almost surely, 2^243243134431 is an apocalyptic number.

243243134431 is a deficient number, since it is larger than the sum of its proper divisors (23460000113).

243243134431 is a wasteful number, since it uses less digits than its factorization.

243243134431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112249001.

The product of its digits is 82944, while the sum is 34.

Adding to 243243134431 its reverse (134431342342), we get a palindrome (377674476773).

The spelling of 243243134431 in words is "two hundred forty-three billion, two hundred forty-three million, one hundred thirty-four thousand, four hundred thirty-one".