216012015 has 20 divisors (see below), whose sum is σ = 387222264. Its totient is φ = 115206192.

The previous prime is 216011959. The next prime is 216012073. The reversal of 216012015 is 510210612.

216012015 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 216012015 - 2⁶ = 216011951 is a prime.

It is a super-2 number, since 2×216012015² = 93322381248720450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 266277 + ... + 267086.

Almost surely, 2^216012015 is an apocalyptic number.

216012015 is a deficient number, since it is larger than the sum of its proper divisors (171210249).

216012015 is an equidigital number, since it uses as much as digits as its factorization.

216012015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533380 (or 533371 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 216012015 is about 14697.3472096158. The cubic root of 216012015 is about 600.0111247937.

Adding to 216012015 its reverse (510210612), we get a palindrome (726222627).

The spelling of 216012015 in words is "two hundred sixteen million, twelve thousand, fifteen".