312213213 has 24 divisors (see below), whose sum is σ = 486318560. Its totient is φ = 191872800.

The previous prime is 312213203. The next prime is 312213227. The reversal of 312213213 is 312312213.

It is not a de Polignac number, because 312213213 - 2¹³ = 312205021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312213203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121698 + ... + 124236.

Almost surely, 2^312213213 is an apocalyptic number.

It is an amenable number.

312213213 is a deficient number, since it is larger than the sum of its proper divisors (174105347).

312213213 is a wasteful number, since it uses less digits than its factorization.

312213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609 (or 3606 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 312213213 is about 17669.5561064787. The cubic root of 312213213 is about 678.3967513642.

Adding to 312213213 its reverse (312312213), we get a palindrome (624525426).

The spelling of 312213213 in words is "three hundred twelve million, two hundred thirteen thousand, two hundred thirteen".