211423444 has 6 divisors (see below), whose sum is σ = 369991034. Its totient is φ = 105711720.

The previous prime is 211423423. The next prime is 211423453. The reversal of 211423444 is 444324112.

It can be written as a sum of positive squares in only one way, i.e., 126562500 + 84860944 = 11250^2 + 9212^2 .

It is a super-2 number, since 2×211423444² = 89399745345642272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26427927 + ... + 26427934.

Almost surely, 2^211423444 is an apocalyptic number.

It is an amenable number.

211423444 is a deficient number, since it is larger than the sum of its proper divisors (158567590).

211423444 is a wasteful number, since it uses less digits than its factorization.

211423444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52855865 (or 52855863 counting only the distinct ones).

The product of its digits is 3072, while the sum is 25.

The square root of 211423444 is about 14540.4072845295. The cubic root of 211423444 is about 595.7321627346.

Adding to 211423444 its reverse (444324112), we get a palindrome (655747556).

The spelling of 211423444 in words is "two hundred eleven million, four hundred twenty-three thousand, four hundred forty-four".