2158305 has 16 divisors (see below), whose sum is σ = 3635520. Its totient is φ = 1090368.

The previous prime is 2158301. The next prime is 2158307. The reversal of 2158305 is 5038512.

2158305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2158305 - 2² = 2158301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2158301) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3502 + ... + 4071.

It is an arithmetic number, because the mean of its divisors is an integer number (227220).

2^2158305 is an apocalyptic number.

It is an amenable number.

2158305 is a deficient number, since it is larger than the sum of its proper divisors (1477215).

2158305 is a wasteful number, since it uses less digits than its factorization.

2158305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7600.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2158305 is about 1469.1170817876. The cubic root of 2158305 is about 129.2322598980.

The spelling of 2158305 in words is "two million, one hundred fifty-eight thousand, three hundred five".