211847103851 has 4 divisors (see below), whose sum is σ = 215844219072. Its totient is φ = 207849988632.

The previous prime is 211847103827. The next prime is 211847103857. The reversal of 211847103851 is 158301748112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211847103851 - 2¹⁰ = 211847102827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211847103799 and 211847103808.

It is not an unprimeable number, because it can be changed into a prime (211847103857) 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 in 3 ways as a sum of consecutive naturals, for example, 1998557531 + ... + 1998557636.

It is an arithmetic number, because the mean of its divisors is an integer number (53961054768).

Almost surely, 2^211847103851 is an apocalyptic number.

211847103851 is a deficient number, since it is larger than the sum of its proper divisors (3997115221).

211847103851 is an equidigital number, since it uses as much as digits as its factorization.

211847103851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997115220.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 211847103851 in words is "two hundred eleven billion, eight hundred forty-seven million, one hundred three thousand, eight hundred fifty-one".