211523404489 has 2 divisors, whose sum is σ = 211523404490. Its totient is φ = 211523404488.

The previous prime is 211523404447. The next prime is 211523404511. The reversal of 211523404489 is 984404325112.

211523404489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108032514489 + 103490890000 = 328683^2 + 321700^2 .

It is a cyclic number.

It is not a de Polignac number, because 211523404489 - 2¹⁷ = 211523273417 is a prime.

It is a super-2 number, since 2×211523404489² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211523404289) 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, 105761702244 + 105761702245.

It is an arithmetic number, because the mean of its divisors is an integer number (105761702245).

Almost surely, 2^211523404489 is an apocalyptic number.

It is an amenable number.

211523404489 is a deficient number, since it is larger than the sum of its proper divisors (1).

211523404489 is an equidigital number, since it uses as much as digits as its factorization.

211523404489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 211523404489 in words is "two hundred eleven billion, five hundred twenty-three million, four hundred four thousand, four hundred eighty-nine".