212243443 has 4 divisors (see below), whose sum is σ = 212325120. Its totient is φ = 212161768.

The previous prime is 212243413. The next prime is 212243459. The reversal of 212243443 is 344342212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212243443 - 2⁹ = 212242931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212243413) 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, 36808 + ... + 42181.

It is an arithmetic number, because the mean of its divisors is an integer number (53081280).

Almost surely, 2^212243443 is an apocalyptic number.

212243443 is a deficient number, since it is larger than the sum of its proper divisors (81677).

212243443 is an equidigital number, since it uses as much as digits as its factorization.

212243443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81676.

The product of its digits is 4608, while the sum is 25.

The square root of 212243443 is about 14568.5772469380. The cubic root of 212243443 is about 596.5013451586.

Adding to 212243443 its reverse (344342212), we get a palindrome (556585655).

The spelling of 212243443 in words is "two hundred twelve million, two hundred forty-three thousand, four hundred forty-three".