243005423431 has 8 divisors (see below), whose sum is σ = 249456265344. Its totient is φ = 236590924920.

The previous prime is 243005423389. The next prime is 243005423443. The reversal of 243005423431 is 134324500342.

It is a happy number.

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 243005423431 - 2¹³ = 243005415239 is a prime.

It is a super-2 number, since 2×243005423431² (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 = 243005423393 and 243005423402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243005423131) 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, 9072301 + ... + 9099046.

It is an arithmetic number, because the mean of its divisors is an integer number (31182033168).

Almost surely, 2^243005423431 is an apocalyptic number.

243005423431 is a deficient number, since it is larger than the sum of its proper divisors (6450841913).

243005423431 is a wasteful number, since it uses less digits than its factorization.

243005423431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18171701.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 243005423431 its reverse (134324500342), we get a palindrome (377329923773).

The spelling of 243005423431 in words is "two hundred forty-three billion, five million, four hundred twenty-three thousand, four hundred thirty-one".