285565155 has 16 divisors (see below), whose sum is σ = 480952320. Its totient is φ = 144285408.

The previous prime is 285565151. The next prime is 285565213. The reversal of 285565155 is 551565582.

It is a happy number.

It is not a de Polignac number, because 285565155 - 2² = 285565151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285565151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500707 + ... + 501276.

It is an arithmetic number, because the mean of its divisors is an integer number (30059520).

Almost surely, 2^285565155 is an apocalyptic number.

285565155 is a deficient number, since it is larger than the sum of its proper divisors (195387165).

285565155 is a wasteful number, since it uses less digits than its factorization.

285565155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002010.

The product of its digits is 300000, while the sum is 42.

The square root of 285565155 is about 16898.6731727671. The cubic root of 285565155 is about 658.5191431221.

The spelling of 285565155 in words is "two hundred eighty-five million, five hundred sixty-five thousand, one hundred fifty-five".