321424443 has 10 divisors (see below), whose sum is σ = 480152684. Its totient is φ = 214282908.

The previous prime is 321424421. The next prime is 321424451. The reversal of 321424443 is 344424123.

It is a happy number.

321424443 is a `hidden beast` number, since 3 + 214 + 2 + 4 + 443 = 666.

It is not a de Polignac number, because 321424443 - 2²¹ = 319327291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321424403) 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 9 ways as a sum of consecutive naturals, for example, 1984021 + ... + 1984182.

Almost surely, 2^321424443 is an apocalyptic number.

321424443 is a deficient number, since it is larger than the sum of its proper divisors (158728241).

321424443 is an equidigital number, since it uses as much as digits as its factorization.

321424443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968215 (or 3968206 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 321424443 is about 17928.3140032743. The cubic root of 321424443 is about 685.0037778398.

Adding to 321424443 its reverse (344424123), we get a palindrome (665848566).

It can be divided in two parts, 32142 and 4443, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 321424443 in words is "three hundred twenty-one million, four hundred twenty-four thousand, four hundred forty-three".