211424 has 12 divisors (see below), whose sum is σ = 416304. Its totient is φ = 105696.

The previous prime is 211403. The next prime is 211427. The reversal of 211424 is 424112.

211424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 211399 and 211408.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 211424.

It is not an unprimeable number, because it can be changed into a prime (211427) by changing a digit.

211424 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3272 + ... + 3335.

It is an arithmetic number, because the mean of its divisors is an integer number (34692).

2²¹¹⁴²⁴ is an apocalyptic number.

It is an amenable number.

211424 is a deficient number, since it is larger than the sum of its proper divisors (204880).

211424 is an equidigital number, since it uses as much as digits as its factorization.

211424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6617 (or 6609 counting only the distinct ones).

The product of its digits is 64, while the sum is 14.

The square root of 211424 is about 459.8086558559. The cubic root of 211424 is about 59.5732684952.

Adding to 211424 its reverse (424112), we get a palindrome (635536).

The spelling of 211424 in words is "two hundred eleven thousand, four hundred twenty-four", and thus it is an iban number.