312233213 has 4 divisors (see below), whose sum is σ = 328666560. Its totient is φ = 295799868.

The previous prime is 312233179. The next prime is 312233219. The reversal of 312233213 is 312332213.

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 312233213 - 2²⁸ = 43797757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312233219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8216645 + ... + 8216682.

It is an arithmetic number, because the mean of its divisors is an integer number (82166640).

Almost surely, 2^312233213 is an apocalyptic number.

It is an amenable number.

312233213 is a deficient number, since it is larger than the sum of its proper divisors (16433347).

312233213 is a wasteful number, since it uses less digits than its factorization.

312233213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16433346.

The product of its digits is 648, while the sum is 20.

The square root of 312233213 is about 17670.1220425893. The cubic root of 312233213 is about 678.4112368127.

Adding to 312233213 its reverse (312332213), we get a palindrome (624565426).

The spelling of 312233213 in words is "three hundred twelve million, two hundred thirty-three thousand, two hundred thirteen".