2188444117 has 2 divisors, whose sum is σ = 2188444118. Its totient is φ = 2188444116.

The previous prime is 2188444099. The next prime is 2188444199. The reversal of 2188444117 is 7114448812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2167274916 + 21169201 = 46554^2 + 4601^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188444117 - 2²³ = 2180055509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2188444117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2188444717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094222058 + 1094222059.

It is an arithmetic number, because the mean of its divisors is an integer number (1094222059).

Almost surely, 2^2188444117 is an apocalyptic number.

It is an amenable number.

2188444117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188444117 is an equidigital number, since it uses as much as digits as its factorization.

2188444117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 40.

The square root of 2188444117 is about 46780.8092811572. The cubic root of 2188444117 is about 1298.3102537237.

The spelling of 2188444117 in words is "two billion, one hundred eighty-eight million, four hundred forty-four thousand, one hundred seventeen".