216084385 has 8 divisors (see below), whose sum is σ = 282874176. Its totient is φ = 157152240.

The previous prime is 216084383. The next prime is 216084431. The reversal of 216084385 is 583480612.

It is a happy number.

216084385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 216084385 - 2¹ = 216084383 is a prime.

It is a super-2 number, since 2×216084385² = 93384922881656450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216084383) 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, 1964349 + ... + 1964458.

It is an arithmetic number, because the mean of its divisors is an integer number (35359272).

Almost surely, 2^216084385 is an apocalyptic number.

It is an amenable number.

216084385 is a deficient number, since it is larger than the sum of its proper divisors (66789791).

216084385 is a wasteful number, since it uses less digits than its factorization.

216084385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928823.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 216084385 is about 14699.8090123648. The cubic root of 216084385 is about 600.0781240865.

The spelling of 216084385 in words is "two hundred sixteen million, eighty-four thousand, three hundred eighty-five".