2805214861 has 2 divisors, whose sum is σ = 2805214862. Its totient is φ = 2805214860.

The previous prime is 2805214823. The next prime is 2805214889. The reversal of 2805214861 is 1684125082.

2805214861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2753100900 + 52113961 = 52470^2 + 7219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2805214861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2805214861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2805214261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402607430 + 1402607431.

It is an arithmetic number, because the mean of its divisors is an integer number (1402607431).

Almost surely, 2^2805214861 is an apocalyptic number.

It is an amenable number.

2805214861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805214861 is an equidigital number, since it uses as much as digits as its factorization.

2805214861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 2805214861 is about 52964.2791039395. The cubic root of 2805214861 is about 1410.3342200189.

The spelling of 2805214861 in words is "two billion, eight hundred five million, two hundred fourteen thousand, eight hundred sixty-one".