312223321 has 4 divisors (see below), whose sum is σ = 325798272. Its totient is φ = 298648372.

The previous prime is 312223267. The next prime is 312223337. The reversal of 312223321 is 123322213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312223321 - 2⁹ = 312222809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312223381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6787441 + ... + 6787486.

It is an arithmetic number, because the mean of its divisors is an integer number (81449568).

Almost surely, 2^312223321 is an apocalyptic number.

It is an amenable number.

312223321 is a deficient number, since it is larger than the sum of its proper divisors (13574951).

312223321 is a wasteful number, since it uses less digits than its factorization.

312223321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13574950.

The product of its digits is 432, while the sum is 19.

The square root of 312223321 is about 17669.8421328545. The cubic root of 312223321 is about 678.4040723872.

Adding to 312223321 its reverse (123322213), we get a palindrome (435545534).

It can be divided in two parts, 31222 and 3321, that added together give a palindrome (34543).

The spelling of 312223321 in words is "three hundred twelve million, two hundred twenty-three thousand, three hundred twenty-one".