211493306871 has 96 divisors (see below), whose sum is σ = 398023262208. Its totient is φ = 105027693120.

The previous prime is 211493306833. The next prime is 211493306897. The reversal of 211493306871 is 178603394112.

211493306871 is a `hidden beast` number, since 2 + 1 + 1 + 493 + 30 + 68 + 71 = 666.

It is not a de Polignac number, because 211493306871 - 2¹¹ = 211493304823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211493306831) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1325050 + ... + 1476056.

It is an arithmetic number, because the mean of its divisors is an integer number (4146075648).

Almost surely, 2^211493306871 is an apocalyptic number.

211493306871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211493306871 is a deficient number, since it is larger than the sum of its proper divisors (186529955337).

211493306871 is a wasteful number, since it uses less digits than its factorization.

211493306871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151121 (or 151118 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 211493306871 in words is "two hundred eleven billion, four hundred ninety-three million, three hundred six thousand, eight hundred seventy-one".