215868512 has 24 divisors (see below), whose sum is σ = 429205392. Its totient is φ = 106864000.

The previous prime is 215868511. The next prime is 215868517.

215868512 is nontrivially palindromic in base 10.

215868512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215868511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30164 + ... + 36627.

It is an arithmetic number, because the mean of its divisors is an integer number (17883558).

Almost surely, 2^215868512 is an apocalyptic number.

It is an amenable number.

215868512 is a deficient number, since it is larger than the sum of its proper divisors (213336880).

215868512 is a wasteful number, since it uses less digits than its factorization.

215868512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66902 (or 66894 counting only the distinct ones).

The product of its digits is 38400, while the sum is 38.

The square root of 215868512 is about 14692.4644631185. The cubic root of 215868512 is about 599.8782271391.

The spelling of 215868512 in words is "two hundred fifteen million, eight hundred sixty-eight thousand, five hundred twelve".