312323221 has 8 divisors (see below), whose sum is σ = 359337600. Its totient is φ = 265908048.

The previous prime is 312323191. The next prime is 312323251. The reversal of 312323221 is 122323213.

It is an interprime number because it is at equal distance from previous prime (312323191) and next prime (312323251).

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

It is not a de Polignac number, because 312323221 - 2¹⁷ = 312192149 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 (312323251) 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, 148681 + ... + 150766.

It is an arithmetic number, because the mean of its divisors is an integer number (44917200).

Almost surely, 2^312323221 is an apocalyptic number.

It is an amenable number.

312323221 is a deficient number, since it is larger than the sum of its proper divisors (47014379).

312323221 is a wasteful number, since it uses less digits than its factorization.

312323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299603.

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

The square root of 312323221 is about 17672.6687571515. The cubic root of 312323221 is about 678.4764194705.

Adding to 312323221 its reverse (122323213), we get a palindrome (434646434).

It can be divided in two parts, 31232 and 3221, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 312323221 in words is "three hundred twelve million, three hundred twenty-three thousand, two hundred twenty-one".