211531574047 has 2 divisors, whose sum is σ = 211531574048. Its totient is φ = 211531574046.

The previous prime is 211531573993. The next prime is 211531574071. The reversal of 211531574047 is 740475135112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211531574047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211531578047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105765787023 + 105765787024.

It is an arithmetic number, because the mean of its divisors is an integer number (105765787024).

Almost surely, 2^211531574047 is an apocalyptic number.

211531574047 is a deficient number, since it is larger than the sum of its proper divisors (1).

211531574047 is an equidigital number, since it uses as much as digits as its factorization.

211531574047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 211531574047 in words is "two hundred eleven billion, five hundred thirty-one million, five hundred seventy-four thousand, forty-seven".