211043531989 has 2 divisors, whose sum is σ = 211043531990. Its totient is φ = 211043531988.

The previous prime is 211043531983. The next prime is 211043532019. The reversal of 211043531989 is 989135340112.

211043531989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198054371089 + 12989160900 = 445033^2 + 113970^2 .

It is a cyclic number.

It is not a de Polignac number, because 211043531989 - 2²¹ = 211041434837 is a prime.

It is a super-2 number, since 2×211043531989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211043531983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105521765994 + 105521765995.

It is an arithmetic number, because the mean of its divisors is an integer number (105521765995).

Almost surely, 2^211043531989 is an apocalyptic number.

It is an amenable number.

211043531989 is a deficient number, since it is larger than the sum of its proper divisors (1).

211043531989 is an equidigital number, since it uses as much as digits as its factorization.

211043531989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 211043531989 in words is "two hundred eleven billion, forty-three million, five hundred thirty-one thousand, nine hundred eighty-nine".