211444 has 6 divisors (see below), whose sum is σ = 370034. Its totient is φ = 105720.

The previous prime is 211441. The next prime is 211457. The reversal of 211444 is 444112.

It can be written as a sum of positive squares in only one way, i.e., 191844 + 19600 = 438^2 + 140^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211441) by changing a digit.

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, 26427 + ... + 26434.

2²¹¹⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

211444 is a deficient number, since it is larger than the sum of its proper divisors (158590).

211444 is a wasteful number, since it uses less digits than its factorization.

211444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52865 (or 52863 counting only the distinct ones).

The product of its digits is 128, while the sum is 16.

The square root of 211444 is about 459.8304035185. The cubic root of 211444 is about 59.5751469129.

Adding to 211444 its reverse (444112), we get a palindrome (655556).

The spelling of 211444 in words is "two hundred eleven thousand, four hundred forty-four", and thus it is an iban number.