28211 has 2 divisors, whose sum is σ = 28212. Its totient is φ = 28210.

The previous prime is 28201. The next prime is 28219. The reversal of 28211 is 11282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28211 - 2¹⁴ = 11827 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28211.

It is not a weakly prime, because it can be changed into another prime (28219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14105 + 14106.

It is an arithmetic number, because the mean of its divisors is an integer number (14106).

2²⁸²¹¹ is an apocalyptic number.

28211 is a deficient number, since it is larger than the sum of its proper divisors (1).

28211 is an equidigital number, since it uses as much as digits as its factorization.

28211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 14.

The square root of 28211 is about 167.9613050676. The cubic root of 28211 is about 30.4419751413.

Adding to 28211 its reverse (11282), we get a palindrome (39493).

The spelling of 28211 in words is "twenty-eight thousand, two hundred eleven".