323216421 has 16 divisors (see below), whose sum is σ = 470922240. Its totient is φ = 195559920.

The previous prime is 323216389. The next prime is 323216437. The reversal of 323216421 is 124612323.

It is not a de Polignac number, because 323216421 - 2⁵ = 323216389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 323216391 and 323216400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323216471) 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 15 ways as a sum of consecutive naturals, for example, 12516 + ... + 28338.

It is an arithmetic number, because the mean of its divisors is an integer number (29432640).

Almost surely, 2^323216421 is an apocalyptic number.

It is an amenable number.

323216421 is a deficient number, since it is larger than the sum of its proper divisors (147705819).

323216421 is a wasteful number, since it uses less digits than its factorization.

323216421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16456.

The product of its digits is 1728, while the sum is 24.

The square root of 323216421 is about 17978.2207406629. The cubic root of 323216421 is about 686.2744108954.

Adding to 323216421 its reverse (124612323), we get a palindrome (447828744).

The spelling of 323216421 in words is "three hundred twenty-three million, two hundred sixteen thousand, four hundred twenty-one".