243420430442 has 16 divisors (see below), whose sum is σ = 417562645632. Its totient is φ = 104255421840.

The previous prime is 243420430417. The next prime is 243420430447. The reversal of 243420430442 is 244034024342.

It is a junction number, because it is equal to n+sod(n) for n = 243420430399 and 243420430408.

It is not an unprimeable number, because it can be changed into a prime (243420430447) 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, 5612609 + ... + 5655812.

It is an arithmetic number, because the mean of its divisors is an integer number (26097665352).

Almost surely, 2^243420430442 is an apocalyptic number.

243420430442 is a deficient number, since it is larger than the sum of its proper divisors (174142215190).

243420430442 is a wasteful number, since it uses less digits than its factorization.

243420430442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11269973.

The product of its (nonzero) digits is 73728, while the sum is 32.

Adding to 243420430442 its reverse (244034024342), we get a palindrome (487454454784).

The spelling of 243420430442 in words is "two hundred forty-three billion, four hundred twenty million, four hundred thirty thousand, four hundred forty-two".