2851811812 has 12 divisors (see below), whose sum is σ = 5284239660. Its totient is φ = 1342029056.

The previous prime is 2851811801. The next prime is 2851811827. The reversal of 2851811812 is 2181181582.

It can be written as a sum of positive squares in 2 ways, for example, as 1096536996 + 1755274816 = 33114^2 + 41896^2 .

It is a super-2 number, since 2×2851811812² = 16265661222125446688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20969137 + ... + 20969272.

It is an arithmetic number, because the mean of its divisors is an integer number (440353305).

Almost surely, 2^2851811812 is an apocalyptic number.

It is an amenable number.

2851811812 is a deficient number, since it is larger than the sum of its proper divisors (2432427848).

2851811812 is a wasteful number, since it uses less digits than its factorization.

2851811812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41938430 (or 41938428 counting only the distinct ones).

The product of its digits is 10240, while the sum is 37.

The square root of 2851811812 is about 53402.3577382123. The cubic root of 2851811812 is about 1418.1003182913.

The spelling of 2851811812 in words is "two billion, eight hundred fifty-one million, eight hundred eleven thousand, eight hundred twelve".