211340873 has 2 divisors, whose sum is σ = 211340874. Its totient is φ = 211340872.

The previous prime is 211340851. The next prime is 211340881. The reversal of 211340873 is 378043112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195244729 + 16096144 = 13973^2 + 4012^2 .

It is a cyclic number.

It is not a de Polignac number, because 211340873 - 2⁶ = 211340809 is a prime.

It is not a weakly prime, because it can be changed into another prime (211340473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105670436 + 105670437.

It is an arithmetic number, because the mean of its divisors is an integer number (105670437).

Almost surely, 2^211340873 is an apocalyptic number.

It is an amenable number.

211340873 is a deficient number, since it is larger than the sum of its proper divisors (1).

211340873 is an equidigital number, since it uses as much as digits as its factorization.

211340873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 211340873 is about 14537.5676438667. The cubic root of 211340873 is about 595.6545986377.

Adding to 211340873 its reverse (378043112), we get a palindrome (589383985).

The spelling of 211340873 in words is "two hundred eleven million, three hundred forty thousand, eight hundred seventy-three".