212244443 has 4 divisors (see below), whose sum is σ = 212380440. Its totient is φ = 212108448.

The previous prime is 212244407. The next prime is 212244449. The reversal of 212244443 is 344442212.

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 212244443 - 2⁶ = 212244379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212244449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65630 + ... + 68787.

It is an arithmetic number, because the mean of its divisors is an integer number (53095110).

Almost surely, 2^212244443 is an apocalyptic number.

212244443 is a deficient number, since it is larger than the sum of its proper divisors (135997).

212244443 is a wasteful number, since it uses less digits than its factorization.

212244443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135996.

The product of its digits is 6144, while the sum is 26.

The square root of 212244443 is about 14568.6115673389. The cubic root of 212244443 is about 596.5022819766.

Adding to 212244443 its reverse (344442212), we get a palindrome (556686655).

The spelling of 212244443 in words is "two hundred twelve million, two hundred forty-four thousand, four hundred forty-three".