2188255 has 4 divisors (see below), whose sum is σ = 2625912. Its totient is φ = 1750600.

The previous prime is 2188237. The next prime is 2188261. The reversal of 2188255 is 5528812.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2188255 - 2⁷ = 2188127 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 8² + 8⁴ + 2²¹ + 5⁴ + 5⁷ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218821 + ... + 218830.

It is an arithmetic number, because the mean of its divisors is an integer number (656478).

2^2188255 is an apocalyptic number.

2188255 is a deficient number, since it is larger than the sum of its proper divisors (437657).

2188255 is an equidigital number, since it uses as much as digits as its factorization.

2188255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437656.

The product of its digits is 6400, while the sum is 31.

The square root of 2188255 is about 1479.2751603404. The cubic root of 2188255 is about 129.8272854305.

The spelling of 2188255 in words is "two million, one hundred eighty-eight thousand, two hundred fifty-five".