805243855 has 16 divisors (see below), whose sum is σ = 1056160224. Its totient is φ = 585763200.

The previous prime is 805243849. The next prime is 805243877. The reversal of 805243855 is 558342508.

It is not a de Polignac number, because 805243855 - 2³ = 805243847 is a prime.

It is a super-2 number, since 2×805243855² = 1296835332030522050, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 88096 + ... + 96805.

It is an arithmetic number, because the mean of its divisors is an integer number (66010014).

Almost surely, 2^805243855 is an apocalyptic number.

805243855 is a deficient number, since it is larger than the sum of its proper divisors (250916369).

805243855 is a wasteful number, since it uses less digits than its factorization.

805243855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184986.

The product of its (nonzero) digits is 192000, while the sum is 40.

The square root of 805243855 is about 28376.8189725346. The cubic root of 805243855 is about 930.3416692725.

The spelling of 805243855 in words is "eight hundred five million, two hundred forty-three thousand, eight hundred fifty-five".