243431423431 has 32 divisors (see below), whose sum is σ = 286349696640. Its totient is φ = 202599014400.

The previous prime is 243431423423. The next prime is 243431423533. The reversal of 243431423431 is 134324134342.

It is a cyclic number.

It is not a de Polignac number, because 243431423431 - 2³ = 243431423423 is a prime.

It is a super-2 number, since 2×243431423431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243431426431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128866935 + ... + 128868823.

It is an arithmetic number, because the mean of its divisors is an integer number (8948428020).

Almost surely, 2^243431423431 is an apocalyptic number.

243431423431 is a deficient number, since it is larger than the sum of its proper divisors (42918273209).

243431423431 is a wasteful number, since it uses less digits than its factorization.

243431423431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835.

The product of its digits is 82944, while the sum is 34.

Adding to 243431423431 its reverse (134324134342), we get a palindrome (377755557773).

The spelling of 243431423431 in words is "two hundred forty-three billion, four hundred thirty-one million, four hundred twenty-three thousand, four hundred thirty-one".