2158071515 has 8 divisors (see below), whose sum is σ = 2590133328. Its totient is φ = 1726158880.

The previous prime is 2158071493. The next prime is 2158071529. The reversal of 2158071515 is 5151708512.

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

It is not a de Polignac number, because 2158071515 - 2⁶ = 2158071451 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, 2516 + ... + 65745.

It is an arithmetic number, because the mean of its divisors is an integer number (323766666).

Almost surely, 2^2158071515 is an apocalyptic number.

2158071515 is a deficient number, since it is larger than the sum of its proper divisors (432061813).

2158071515 is an equidigital number, since it uses as much as digits as its factorization.

2158071515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74589.

The product of its (nonzero) digits is 14000, while the sum is 35.

The square root of 2158071515 is about 46455.0483263122. The cubic root of 2158071515 is about 1292.2759962332.

The spelling of 2158071515 in words is "two billion, one hundred fifty-eight million, seventy-one thousand, five hundred fifteen".