211530353 has 2 divisors, whose sum is σ = 211530354. Its totient is φ = 211530352.

The previous prime is 211530349. The next prime is 211530377. The reversal of 211530353 is 353035112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202578289 + 8952064 = 14233^2 + 2992^2 .

It is a cyclic number.

It is not a de Polignac number, because 211530353 - 2² = 211530349 is a prime.

It is not a weakly prime, because it can be changed into another prime (211535353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105765176 + 105765177.

It is an arithmetic number, because the mean of its divisors is an integer number (105765177).

Almost surely, 2^211530353 is an apocalyptic number.

It is an amenable number.

211530353 is a deficient number, since it is larger than the sum of its proper divisors (1).

211530353 is an equidigital number, since it uses as much as digits as its factorization.

211530353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 211530353 is about 14544.0830924469. The cubic root of 211530353 is about 595.8325590396.

Adding to 211530353 its reverse (353035112), we get a palindrome (564565465).

The spelling of 211530353 in words is "two hundred eleven million, five hundred thirty thousand, three hundred fifty-three".