421004143443 has 16 divisors (see below), whose sum is σ = 604532176640. Its totient is φ = 259073727264.

The previous prime is 421004143423. The next prime is 421004143457. The reversal of 421004143443 is 344341400124.

It is not a de Polignac number, because 421004143443 - 2³⁰ = 419930401619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421004143443.

It is not an unprimeable number, because it can be changed into a prime (421004143403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2260530 + ... + 2439672.

It is an arithmetic number, because the mean of its divisors is an integer number (37783261040).

Almost surely, 2^421004143443 is an apocalyptic number.

421004143443 is a deficient number, since it is larger than the sum of its proper divisors (183528033197).

421004143443 is a wasteful number, since it uses less digits than its factorization.

421004143443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239418.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 421004143443 its reverse (344341400124), we get a palindrome (765345543567).

The spelling of 421004143443 in words is "four hundred twenty-one billion, four million, one hundred forty-three thousand, four hundred forty-three".