211081049 has 2 divisors, whose sum is σ = 211081050. Its totient is φ = 211081048.

The previous prime is 211081037. The next prime is 211081063. The reversal of 211081049 is 940180112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113209600 + 97871449 = 10640^2 + 9893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211081049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (211081019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105540524 + 105540525.

It is an arithmetic number, because the mean of its divisors is an integer number (105540525).

Almost surely, 2^211081049 is an apocalyptic number.

It is an amenable number.

211081049 is a deficient number, since it is larger than the sum of its proper divisors (1).

211081049 is an equidigital number, since it uses as much as digits as its factorization.

211081049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 211081049 is about 14528.6286001123. The cubic root of 211081049 is about 595.4103978436.

The spelling of 211081049 in words is "two hundred eleven million, eighty-one thousand, forty-nine".