2851211871 has 12 divisors (see below), whose sum is σ = 4120515672. Its totient is φ = 1899839376.

The previous prime is 2851211861. The next prime is 2851211911. The reversal of 2851211871 is 1781121582.

2851211871 is a `hidden beast` number, since 28 + 512 + 118 + 7 + 1 = 666.

It is not a de Polignac number, because 2851211871 - 2⁹ = 2851211359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851211851) 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 11 ways as a sum of consecutive naturals, for example, 61836 + ... + 97601.

It is an arithmetic number, because the mean of its divisors is an integer number (343376306).

Almost surely, 2^2851211871 is an apocalyptic number.

2851211871 is a deficient number, since it is larger than the sum of its proper divisors (1269303801).

2851211871 is a wasteful number, since it uses less digits than its factorization.

2851211871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161430 (or 161427 counting only the distinct ones).

The product of its digits is 8960, while the sum is 36.

The square root of 2851211871 is about 53396.7402656754. The cubic root of 2851211871 is about 1418.0008685092. Note that the first 3 decimals are identical.

The spelling of 2851211871 in words is "two billion, eight hundred fifty-one million, two hundred eleven thousand, eight hundred seventy-one".