2085539815 has 4 divisors (see below), whose sum is σ = 2502647784. Its totient is φ = 1668431848.

The previous prime is 2085539783. The next prime is 2085539831. The reversal of 2085539815 is 5189355802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5189355802 = 2 ⋅2594677901.

It is a cyclic number.

It is not a de Polignac number, because 2085539815 - 2⁵ = 2085539783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208553977 + ... + 208553986.

It is an arithmetic number, because the mean of its divisors is an integer number (625661946).

Almost surely, 2^2085539815 is an apocalyptic number.

2085539815 is a deficient number, since it is larger than the sum of its proper divisors (417107969).

2085539815 is an equidigital number, since it uses as much as digits as its factorization.

2085539815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417107968.

The product of its (nonzero) digits is 432000, while the sum is 46.

The square root of 2085539815 is about 45667.7108578917. The cubic root of 2085539815 is about 1277.6331209580.

The spelling of 2085539815 in words is "two billion, eighty-five million, five hundred thirty-nine thousand, eight hundred fifteen".