211531168427 has 2 divisors, whose sum is σ = 211531168428. Its totient is φ = 211531168426.

The previous prime is 211531168421. The next prime is 211531168439. The reversal of 211531168427 is 724861135112.

211531168427 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 is a cyclic number.

It is not a de Polignac number, because 211531168427 - 2¹⁶ = 211531102891 is a prime.

It is not a weakly prime, because it can be changed into another prime (211531168421) 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, 105765584213 + 105765584214.

It is an arithmetic number, because the mean of its divisors is an integer number (105765584214).

Almost surely, 2^211531168427 is an apocalyptic number.

211531168427 is a deficient number, since it is larger than the sum of its proper divisors (1).

211531168427 is an equidigital number, since it uses as much as digits as its factorization.

211531168427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 41.

The spelling of 211531168427 in words is "two hundred eleven billion, five hundred thirty-one million, one hundred sixty-eight thousand, four hundred twenty-seven".