82557855 has 12 divisors (see below), whose sum is σ = 143100360. Its totient is φ = 44030832.

The previous prime is 82557829. The next prime is 82557919. The reversal of 82557855 is 55875528.

82557855 is a `hidden beast` number, since 8 + 25 + 578 + 55 = 666.

It is not a de Polignac number, because 82557855 - 2⁵ = 82557823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1834619 = 82557855 / (8 + 2 + 5 + 5 + 7 + 8 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 82557855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 917265 + ... + 917354.

It is an arithmetic number, because the mean of its divisors is an integer number (11925030).

Almost surely, 2^82557855 is an apocalyptic number.

82557855 is a deficient number, since it is larger than the sum of its proper divisors (60542505).

82557855 is a wasteful number, since it uses less digits than its factorization.

82557855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834630 (or 1834627 counting only the distinct ones).

The product of its digits is 560000, while the sum is 45.

The square root of 82557855 is about 9086.1353170641. The cubic root of 82557855 is about 435.4311223220.

It can be divided in two parts, 8255 and 7855, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 82557855 in words is "eighty-two million, five hundred fifty-seven thousand, eight hundred fifty-five".