212243233 has 4 divisors (see below), whose sum is σ = 213131520. Its totient is φ = 211354948.

The previous prime is 212243221. The next prime is 212243261. The reversal of 212243233 is 332342212.

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 212243233 - 2⁹ = 212242721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212243263) 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, 443785 + ... + 444262.

It is an arithmetic number, because the mean of its divisors is an integer number (53282880).

Almost surely, 2^212243233 is an apocalyptic number.

It is an amenable number.

212243233 is a deficient number, since it is larger than the sum of its proper divisors (888287).

212243233 is an equidigital number, since it uses as much as digits as its factorization.

212243233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888286.

The product of its digits is 1728, while the sum is 22.

The square root of 212243233 is about 14568.5700396436. The cubic root of 212243233 is about 596.5011484265.

Adding to 212243233 its reverse (332342212), we get a palindrome (544585445).

The spelling of 212243233 in words is "two hundred twelve million, two hundred forty-three thousand, two hundred thirty-three".