2158655 has 4 divisors (see below), whose sum is σ = 2590392. Its totient is φ = 1726920.

The previous prime is 2158649. The next prime is 2158679. The reversal of 2158655 is 5568512.

2158655 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 2158655 - 2⁶ = 2158591 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, 215861 + ... + 215870.

It is an arithmetic number, because the mean of its divisors is an integer number (647598).

2^2158655 is an apocalyptic number.

2158655 is a deficient number, since it is larger than the sum of its proper divisors (431737).

2158655 is an equidigital number, since it uses as much as digits as its factorization.

2158655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431736.

The product of its digits is 12000, while the sum is 32.

The square root of 2158655 is about 1469.2361961237. The cubic root of 2158655 is about 129.2392451397.

The spelling of 2158655 in words is "two million, one hundred fifty-eight thousand, six hundred fifty-five".