312033213 has 6 divisors (see below), whose sum is σ = 450714654. Its totient is φ = 208022136.

The previous prime is 312033193. The next prime is 312033217. The reversal of 312033213 is 312330213.

It can be written as a sum of positive squares in only one way, i.e., 230979204 + 81054009 = 15198^2 + 9003^2 .

It is not a de Polignac number, because 312033213 - 2⁶ = 312033149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312033217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17335170 + ... + 17335187.

It is an arithmetic number, because the mean of its divisors is an integer number (75119109).

Almost surely, 2^312033213 is an apocalyptic number.

It is an amenable number.

312033213 is a deficient number, since it is larger than the sum of its proper divisors (138681441).

312033213 is a wasteful number, since it uses less digits than its factorization.

312033213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34670363 (or 34670360 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 312033213 is about 17664.4618655650. The cubic root of 312033213 is about 678.2663544809.

Adding to 312033213 its reverse (312330213), we get a palindrome (624363426).

The spelling of 312033213 in words is "three hundred twelve million, thirty-three thousand, two hundred thirteen".