215265085 has 32 divisors (see below), whose sum is σ = 311040000. Its totient is φ = 142813440.

The previous prime is 215265077. The next prime is 215265091. The reversal of 215265085 is 580562512.

It is not a de Polignac number, because 215265085 - 2³ = 215265077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215265085.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51141 + ... + 55189.

It is an arithmetic number, because the mean of its divisors is an integer number (9720000).

Almost surely, 2^215265085 is an apocalyptic number.

It is an amenable number.

215265085 is a deficient number, since it is larger than the sum of its proper divisors (95774915).

215265085 is an equidigital number, since it uses as much as digits as its factorization.

215265085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106 (or 4092 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 215265085 is about 14671.9148375391. The cubic root of 215265085 is about 599.3187499382.

The spelling of 215265085 in words is "two hundred fifteen million, two hundred sixty-five thousand, eighty-five".