421543430243 has 8 divisors (see below), whose sum is σ = 456322026048. Its totient is φ = 387100859904.

The previous prime is 421543430233. The next prime is 421543430261. The reversal of 421543430243 is 342034345124.

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 421543430243 - 2⁴ = 421543430227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421543430233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84003755 + ... + 84008772.

It is an arithmetic number, because the mean of its divisors is an integer number (57040253256).

Almost surely, 2^421543430243 is an apocalyptic number.

421543430243 is a deficient number, since it is larger than the sum of its proper divisors (34778595805).

421543430243 is a wasteful number, since it uses less digits than its factorization.

421543430243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168012733.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 421543430243 its reverse (342034345124), we get a palindrome (763577775367).

The spelling of 421543430243 in words is "four hundred twenty-one billion, five hundred forty-three million, four hundred thirty thousand, two hundred forty-three".