211361 has 4 divisors (see below), whose sum is σ = 223812. Its totient is φ = 198912.

The previous prime is 211349. The next prime is 211369. The reversal of 211361 is 163112.

211361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93025 + 118336 = 305^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 211361 - 2⁶ = 211297 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 211361.

It is not an unprimeable number, because it can be changed into a prime (211369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6200 + ... + 6233.

It is an arithmetic number, because the mean of its divisors is an integer number (55953).

2²¹¹³⁶¹ is an apocalyptic number.

It is an amenable number.

211361 is a deficient number, since it is larger than the sum of its proper divisors (12451).

211361 is a wasteful number, since it uses less digits than its factorization.

211361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12450.

The product of its digits is 36, while the sum is 14.

The square root of 211361 is about 459.7401439944. The cubic root of 211361 is about 59.5673507048.

Adding to 211361 its reverse (163112), we get a palindrome (374473).

It can be divided in two parts, 2 and 11361, that multiplied together give a palindrome (22722).

The spelling of 211361 in words is "two hundred eleven thousand, three hundred sixty-one".