421431234543 has 72 divisors (see below), whose sum is σ = 697444766928. Its totient is φ = 243118368000.

The previous prime is 421431234493. The next prime is 421431234551. The reversal of 421431234543 is 345432134124.

421431234543 is a `hidden beast` number, since 42 + 1 + 43 + 1 + 2 + 34 + 543 = 666.

It is not a de Polignac number, because 421431234543 - 2¹⁰ = 421431233519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421431234498 and 421431234507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421431234593) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5767171 + ... + 5839787.

It is an arithmetic number, because the mean of its divisors is an integer number (9686732874).

Almost surely, 2^421431234543 is an apocalyptic number.

421431234543 is a deficient number, since it is larger than the sum of its proper divisors (276013532385).

421431234543 is a wasteful number, since it uses less digits than its factorization.

421431234543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72757 (or 72723 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

Adding to 421431234543 its reverse (345432134124), we get a palindrome (766863368667).

The spelling of 421431234543 in words is "four hundred twenty-one billion, four hundred thirty-one million, two hundred thirty-four thousand, five hundred forty-three".