2188015805 has 16 divisors (see below), whose sum is σ = 2717466624. Its totient is φ = 1689479040.

The previous prime is 2188015759. The next prime is 2188015807. The reversal of 2188015805 is 5085108812.

2188015805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2188015805 - 2¹⁴ = 2187999421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188015807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40937 + ... + 77793.

It is an arithmetic number, because the mean of its divisors is an integer number (169841664).

Almost surely, 2^2188015805 is an apocalyptic number.

It is an amenable number.

2188015805 is a deficient number, since it is larger than the sum of its proper divisors (529450819).

2188015805 is a wasteful number, since it uses less digits than its factorization.

2188015805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37276.

The product of its (nonzero) digits is 25600, while the sum is 38.

The square root of 2188015805 is about 46776.2311970514. The cubic root of 2188015805 is about 1298.2255484698.

The spelling of 2188015805 in words is "two billion, one hundred eighty-eight million, fifteen thousand, eight hundred five".