312243213 has 8 divisors (see below), whose sum is σ = 416416576. Its totient is φ = 208116000.

The previous prime is 312243143. The next prime is 312243221. The reversal of 312243213 is 312342213.

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

It is not a de Polignac number, because 312243213 - 2¹² = 312239117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 312243213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312243293) 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 7 ways as a sum of consecutive naturals, for example, 9993 + ... + 26913.

It is an arithmetic number, because the mean of its divisors is an integer number (52052072).

Almost surely, 2^312243213 is an apocalyptic number.

It is an amenable number.

312243213 is a deficient number, since it is larger than the sum of its proper divisors (104173363).

312243213 is a wasteful number, since it uses less digits than its factorization.

312243213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23075.

The product of its digits is 864, while the sum is 21.

The square root of 312243213 is about 17670.4050038475. The cubic root of 312243213 is about 678.4184793051.

Adding to 312243213 its reverse (312342213), we get a palindrome (624585426).

The spelling of 312243213 in words is "three hundred twelve million, two hundred forty-three thousand, two hundred thirteen".