323130233221 has 4 divisors (see below), whose sum is σ = 323164835244. Its totient is φ = 323095631200.

The previous prime is 323130233219. The next prime is 323130233249. The reversal of 323130233221 is 122332031323.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139505985025 + 183624248196 = 373505^2 + 428514^2 .

It is a cyclic number.

It is not a de Polignac number, because 323130233221 - 2¹ = 323130233219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323130230221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17287000 + ... + 17305681.

It is an arithmetic number, because the mean of its divisors is an integer number (80791208811).

Almost surely, 2^323130233221 is an apocalyptic number.

It is an amenable number.

323130233221 is a deficient number, since it is larger than the sum of its proper divisors (34602023).

323130233221 is an equidigital number, since it uses as much as digits as its factorization.

323130233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34602022.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 323130233221 its reverse (122332031323), we get a palindrome (445462264544).

The spelling of 323130233221 in words is "three hundred twenty-three billion, one hundred thirty million, two hundred thirty-three thousand, two hundred twenty-one".