211040447 has 2 divisors, whose sum is σ = 211040448. Its totient is φ = 211040446.

The previous prime is 211040441. The next prime is 211040461. The reversal of 211040447 is 744040112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211040447 - 2⁸ = 211040191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211040441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105520223 + 105520224.

It is an arithmetic number, because the mean of its divisors is an integer number (105520224).

Almost surely, 2^211040447 is an apocalyptic number.

211040447 is a deficient number, since it is larger than the sum of its proper divisors (1).

211040447 is an equidigital number, since it uses as much as digits as its factorization.

211040447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 211040447 is about 14527.2312227761. The cubic root of 211040447 is about 595.3722191388.

Adding to 211040447 its reverse (744040112), we get a palindrome (955080559).

The spelling of 211040447 in words is "two hundred eleven million, forty thousand, four hundred forty-seven".