2158315 has 4 divisors (see below), whose sum is σ = 2589984. Its totient is φ = 1726648.

The previous prime is 2158307. The next prime is 2158333. The reversal of 2158315 is 5138512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2158315 - 2³ = 2158307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2158315.

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, 215827 + ... + 215836.

It is an arithmetic number, because the mean of its divisors is an integer number (647496).

2^2158315 is an apocalyptic number.

2158315 is a deficient number, since it is larger than the sum of its proper divisors (431669).

2158315 is an equidigital number, since it uses as much as digits as its factorization.

2158315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431668.

The product of its digits is 1200, while the sum is 25.

The square root of 2158315 is about 1469.1204851883. The cubic root of 2158315 is about 129.2324594868.

The spelling of 2158315 in words is "two million, one hundred fifty-eight thousand, three hundred fifteen".