2158913915 has 8 divisors (see below), whose sum is σ = 2593857168. Its totient is φ = 1725024160.

The previous prime is 2158913803. The next prime is 2158913921. The reversal of 2158913915 is 5193198512.

2158913915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2158913915 - 2¹⁸ = 2158651771 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258857 + ... + 267066.

It is an arithmetic number, because the mean of its divisors is an integer number (324232146).

Almost surely, 2^2158913915 is an apocalyptic number.

2158913915 is a deficient number, since it is larger than the sum of its proper divisors (434943253).

2158913915 is an equidigital number, since it uses as much as digits as its factorization.

2158913915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526749.

The product of its digits is 97200, while the sum is 44.

The square root of 2158913915 is about 46464.1142711233. The cubic root of 2158913915 is about 1292.4441203626. Note that the first 3 decimals are identical.

The spelling of 2158913915 in words is "two billion, one hundred fifty-eight million, nine hundred thirteen thousand, nine hundred fifteen".