312323321 has 4 divisors (see below), whose sum is σ = 312526500. Its totient is φ = 312120144.

The previous prime is 312323309. The next prime is 312323369. The reversal of 312323321 is 123323213.

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 73188025 + 239135296 = 8555^2 + 15464^2 .

It is a cyclic number.

It is not a de Polignac number, because 312323321 - 2¹⁴ = 312306937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312323293 and 312323302.

It is not an unprimeable number, because it can be changed into a prime (312323021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99266 + ... + 102363.

It is an arithmetic number, because the mean of its divisors is an integer number (78131625).

Almost surely, 2^312323321 is an apocalyptic number.

It is an amenable number.

312323321 is a deficient number, since it is larger than the sum of its proper divisors (203179).

312323321 is a wasteful number, since it uses less digits than its factorization.

312323321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203178.

The product of its digits is 648, while the sum is 20.

The square root of 312323321 is about 17672.6715863788. The cubic root of 312323321 is about 678.4764918823.

Adding to 312323321 its reverse (123323213), we get a palindrome (435646534).

The spelling of 312323321 in words is "three hundred twelve million, three hundred twenty-three thousand, three hundred twenty-one".