243534431 has 8 divisors (see below), whose sum is σ = 287922720. Its totient is φ = 201545568.

The previous prime is 243534397. The next prime is 243534433. The reversal of 243534431 is 134435342.

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

It is not a de Polignac number, because 243534431 - 2²⁶ = 176425567 is a prime.

It is a super-3 number, since 3×243534431³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243534394 and 243534403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243534433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599636 + ... + 600041.

It is an arithmetic number, because the mean of its divisors is an integer number (35990340).

Almost surely, 2^243534431 is an apocalyptic number.

243534431 is a deficient number, since it is larger than the sum of its proper divisors (44388289).

243534431 is a wasteful number, since it uses less digits than its factorization.

243534431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199713.

The product of its digits is 17280, while the sum is 29.

The square root of 243534431 is about 15605.5897357325. The cubic root of 243534431 is about 624.4822857268.

Adding to 243534431 its reverse (134435342), we get a palindrome (377969773).

The spelling of 243534431 in words is "two hundred forty-three million, five hundred thirty-four thousand, four hundred thirty-one".