2188508813 has 2 divisors, whose sum is σ = 2188508814. Its totient is φ = 2188508812.

The previous prime is 2188508761. The next prime is 2188508827. The reversal of 2188508813 is 3188058812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2072343529 + 116165284 = 45523^2 + 10778^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188508813 - 2¹⁴ = 2188492429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2188538813) 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 as a sum of consecutive naturals, namely, 1094254406 + 1094254407.

It is an arithmetic number, because the mean of its divisors is an integer number (1094254407).

Almost surely, 2^2188508813 is an apocalyptic number.

It is an amenable number.

2188508813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188508813 is an equidigital number, since it uses as much as digits as its factorization.

2188508813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122880, while the sum is 44.

The square root of 2188508813 is about 46781.5007561750. The cubic root of 2188508813 is about 1298.3230473871.

The spelling of 2188508813 in words is "two billion, one hundred eighty-eight million, five hundred eight thousand, eight hundred thirteen".