385216855 has 16 divisors (see below), whose sum is σ = 492709824. Its totient is φ = 288115200.

The previous prime is 385216847. The next prime is 385216859. The reversal of 385216855 is 558612583.

It is not a de Polignac number, because 385216855 - 2³ = 385216847 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 (385216859) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2172 + ... + 27841.

It is an arithmetic number, because the mean of its divisors is an integer number (30794364).

Almost surely, 2^385216855 is an apocalyptic number.

385216855 is a deficient number, since it is larger than the sum of its proper divisors (107492969).

385216855 is a wasteful number, since it uses less digits than its factorization.

385216855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30186.

The product of its digits is 288000, while the sum is 43.

The square root of 385216855 is about 19626.9420695125. The cubic root of 385216855 is about 727.6151957183.

The spelling of 385216855 in words is "three hundred eighty-five million, two hundred sixteen thousand, eight hundred fifty-five".