320233321 has 4 divisors (see below), whose sum is σ = 320685700. Its totient is φ = 319780944.

The previous prime is 320233313. The next prime is 320233349. The reversal of 320233321 is 123332023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123332023 = 1721 ⋅71663.

It can be written as a sum of positive squares in 2 ways, for example, as 167340096 + 152893225 = 12936^2 + 12365^2 .

It is a cyclic number.

It is not a de Polignac number, because 320233321 - 2³ = 320233313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320233351) 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, 225126 + ... + 226543.

It is an arithmetic number, because the mean of its divisors is an integer number (80171425).

Almost surely, 2^320233321 is an apocalyptic number.

It is an amenable number.

320233321 is a deficient number, since it is larger than the sum of its proper divisors (452379).

320233321 is an equidigital number, since it uses as much as digits as its factorization.

320233321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452378.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 320233321 is about 17895.0641518828. The cubic root of 320233321 is about 684.1565771580.

Adding to 320233321 its reverse (123332023), we get a palindrome (443565344).

It can be divided in two parts, 32023 and 3321, that added together give a square (35344 = 188²).

The spelling of 320233321 in words is "three hundred twenty million, two hundred thirty-three thousand, three hundred twenty-one".