421333443 has 12 divisors (see below), whose sum is σ = 616930600. Its totient is φ = 277040736.

The previous prime is 421333441. The next prime is 421333459. The reversal of 421333443 is 344333124.

421333443 is a `hidden beast` number, since 4 + 213 + 3 + 3 + 443 = 666.

It is not a de Polignac number, because 421333443 - 2¹ = 421333441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421333441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319993 + ... + 321306.

Almost surely, 2^421333443 is an apocalyptic number.

421333443 is a deficient number, since it is larger than the sum of its proper divisors (195597157).

421333443 is a wasteful number, since it uses less digits than its factorization.

421333443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641378 (or 641375 counting only the distinct ones).

The product of its digits is 10368, while the sum is 27.

The square root of 421333443 is about 20526.4084291432. The cubic root of 421333443 is about 749.6789399135.

Adding to 421333443 its reverse (344333124), we get a palindrome (765666567).

The spelling of 421333443 in words is "four hundred twenty-one million, three hundred thirty-three thousand, four hundred forty-three".