216210005 has 32 divisors (see below), whose sum is σ = 299870208. Its totient is φ = 148104000.

The previous prime is 216209989. The next prime is 216210031. The reversal of 216210005 is 500012612.

216210005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216210005 - 2⁴ = 216209989 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83480 + ... + 86030.

It is an arithmetic number, because the mean of its divisors is an integer number (9370944).

Almost surely, 2^216210005 is an apocalyptic number.

It is an amenable number.

216210005 is a deficient number, since it is larger than the sum of its proper divisors (83660203).

216210005 is a wasteful number, since it uses less digits than its factorization.

216210005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 216210005 is about 14704.0812361739. The cubic root of 216210005 is about 600.1943860907.

Adding to 216210005 its reverse (500012612), we get a palindrome (716222617).

It can be divided in two parts, 2162 and 10005, that added together give a cube (12167 = 23³).

The spelling of 216210005 in words is "two hundred sixteen million, two hundred ten thousand, five".