2143655 has 4 divisors (see below), whose sum is σ = 2572392. Its totient is φ = 1714920.

The previous prime is 2143627. The next prime is 2143667. The reversal of 2143655 is 5563412.

2143655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2143655 - 2¹⁴ = 2127271 is a prime.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214361 + ... + 214370.

It is an arithmetic number, because the mean of its divisors is an integer number (643098).

2^2143655 is an apocalyptic number.

2143655 is a deficient number, since it is larger than the sum of its proper divisors (428737).

2143655 is an equidigital number, since it uses as much as digits as its factorization.

2143655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428736.

The product of its digits is 3600, while the sum is 26.

The square root of 2143655 is about 1464.1226041558. The cubic root of 2143655 is about 128.9391977549.

The spelling of 2143655 in words is "two million, one hundred forty-three thousand, six hundred fifty-five".