323021421 has 12 divisors (see below), whose sum is σ = 469719900. Its totient is φ = 213901440.

The previous prime is 323021417. The next prime is 323021429. The reversal of 323021421 is 124120323.

It can be written as a sum of positive squares in 2 ways, for example, as 95765796 + 227255625 = 9786^2 + 15075^2 .

It is not a de Polignac number, because 323021421 - 2² = 323021417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 323021394 and 323021403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323021429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119100 + ... + 121781.

It is an arithmetic number, because the mean of its divisors is an integer number (39143325).

Almost surely, 2^323021421 is an apocalyptic number.

It is an amenable number.

323021421 is a deficient number, since it is larger than the sum of its proper divisors (146698479).

323021421 is a wasteful number, since it uses less digits than its factorization.

323021421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241036 (or 241033 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 323021421 is about 17972.7966938927. The cubic root of 323021421 is about 686.1363708466.

Adding to 323021421 its reverse (124120323), we get a palindrome (447141744).

The spelling of 323021421 in words is "three hundred twenty-three million, twenty-one thousand, four hundred twenty-one".