243430443431 has 4 divisors (see below), whose sum is σ = 278206221072. Its totient is φ = 208654665792.

The previous prime is 243430443397. The next prime is 243430443461. The reversal of 243430443431 is 134344034342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243430443431 - 2¹⁰ = 243430442407 is a prime.

It is a super-2 number, since 2×243430443431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243430443391 and 243430443400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243430443461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17387888810 + ... + 17387888823.

It is an arithmetic number, because the mean of its divisors is an integer number (69551555268).

Almost surely, 2^243430443431 is an apocalyptic number.

243430443431 is a deficient number, since it is larger than the sum of its proper divisors (34775777641).

243430443431 is an equidigital number, since it uses as much as digits as its factorization.

243430443431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34775777640.

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 243430443431 its reverse (134344034342), we get a palindrome (377774477773).

The spelling of 243430443431 in words is "two hundred forty-three billion, four hundred thirty million, four hundred forty-three thousand, four hundred thirty-one".