216000511 has 4 divisors (see below), whose sum is σ = 216106000. Its totient is φ = 215895024.

The previous prime is 216000509. The next prime is 216000539. The reversal of 216000511 is 115000612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216000511 - 2¹ = 216000509 is a prime.

It is a super-3 number, since 3×216000511³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216000541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49611 + ... + 53788.

It is an arithmetic number, because the mean of its divisors is an integer number (54026500).

Almost surely, 2^216000511 is an apocalyptic number.

216000511 is a deficient number, since it is larger than the sum of its proper divisors (105489).

216000511 is a wasteful number, since it uses less digits than its factorization.

216000511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105488.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 216000511 is about 14696.9558412618. The cubic root of 216000511 is about 600.0004731478. Note that the first 3 decimals are identical.

The spelling of 216000511 in words is "two hundred sixteen million, five hundred eleven", and thus it is an aban number.