215160985 has 8 divisors (see below), whose sum is σ = 278054280. Its totient is φ = 158888064.

The previous prime is 215160941. The next prime is 215161013. The reversal of 215160985 is 589061512.

It can be written as a sum of positive squares in 4 ways, for example, as 14768649 + 200392336 = 3843^2 + 14156^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 215160985 - 2²⁷ = 80943257 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655020 + ... + 1655149.

It is an arithmetic number, because the mean of its divisors is an integer number (34756785).

Almost surely, 2^215160985 is an apocalyptic number.

It is an amenable number.

215160985 is a deficient number, since it is larger than the sum of its proper divisors (62893295).

215160985 is a wasteful number, since it uses less digits than its factorization.

215160985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3310187.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 215160985 is about 14668.3668143389. The cubic root of 215160985 is about 599.2221262157. Note that the first 3 decimals are identical.

It can be divided in two parts, 2151 and 60985, that added together give a palindrome (63136).

The spelling of 215160985 in words is "two hundred fifteen million, one hundred sixty thousand, nine hundred eighty-five".