243134431307 has 16 divisors (see below), whose sum is σ = 261116513280. Its totient is φ = 225584206848.

The previous prime is 243134431279. The next prime is 243134431357. The reversal of 243134431307 is 703134431342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243134431307 - 2⁸ = 243134431051 is a prime.

It is a super-2 number, since 2×243134431307² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243134431357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19682 + ... + 697607.

It is an arithmetic number, because the mean of its divisors is an integer number (16319782080).

Almost surely, 2^243134431307 is an apocalyptic number.

243134431307 is a deficient number, since it is larger than the sum of its proper divisors (17982081973).

243134431307 is a wasteful number, since it uses less digits than its factorization.

243134431307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717590.

The product of its (nonzero) digits is 72576, while the sum is 35.

Adding to 243134431307 its sum of digits (35), we get a palindrome (243134431342).

Adding to 243134431307 its reverse (703134431342), we get a palindrome (946268862649).

The spelling of 243134431307 in words is "two hundred forty-three billion, one hundred thirty-four million, four hundred thirty-one thousand, three hundred seven".