215073085 has 8 divisors (see below), whose sum is σ = 264382776. Its totient is φ = 167861760.

The previous prime is 215073083. The next prime is 215073097. The reversal of 215073085 is 580370512.

215073085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8231161 + 206841924 = 2869^2 + 14382^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215073085 - 2¹ = 215073083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215073083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524364 + ... + 524773.

It is an arithmetic number, because the mean of its divisors is an integer number (33047847).

Almost surely, 2^215073085 is an apocalyptic number.

It is an amenable number.

215073085 is a deficient number, since it is larger than the sum of its proper divisors (49309691).

215073085 is a wasteful number, since it uses less digits than its factorization.

215073085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049183.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 215073085 is about 14665.3702646745. The cubic root of 215073085 is about 599.1405147668.

The spelling of 215073085 in words is "two hundred fifteen million, seventy-three thousand, eighty-five".