323130021 has 8 divisors (see below), whose sum is σ = 433584864. Its totient is φ = 214047600.

The previous prime is 323130011. The next prime is 323130043. The reversal of 323130021 is 120031323.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 323130021 - 2¹³ = 323121829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323130011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342555 + ... + 343496.

It is an arithmetic number, because the mean of its divisors is an integer number (54198108).

Almost surely, 2^323130021 is an apocalyptic number.

It is an amenable number.

323130021 is a deficient number, since it is larger than the sum of its proper divisors (110454843).

323130021 is a wasteful number, since it uses less digits than its factorization.

323130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686211.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 323130021 is about 17975.8176726401. The cubic root of 323130021 is about 686.2132553874.

Adding to 323130021 its reverse (120031323), we get a palindrome (443161344).

The spelling of 323130021 in words is "three hundred twenty-three million, one hundred thirty thousand, twenty-one".