243012431 has 8 divisors (see below), whose sum is σ = 251568720. Its totient is φ = 234467968.

The previous prime is 243012421. The next prime is 243012443. The reversal of 243012431 is 134210342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243012431 is a prime.

It is a super-3 number, since 3×243012431³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243012421) 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, 68360 + ... + 71826.

It is an arithmetic number, because the mean of its divisors is an integer number (31446090).

Almost surely, 2^243012431 is an apocalyptic number.

243012431 is a deficient number, since it is larger than the sum of its proper divisors (8556289).

243012431 is a wasteful number, since it uses less digits than its factorization.

243012431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5913.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 243012431 is about 15588.8559875316. The cubic root of 243012431 is about 624.0357876897.

Adding to 243012431 its reverse (134210342), we get a palindrome (377222773).

The spelling of 243012431 in words is "two hundred forty-three million, twelve thousand, four hundred thirty-one".