216534516 has 48 divisors (see below), whose sum is σ = 552726720. Its totient is φ = 65432320.

The previous prime is 216534511. The next prime is 216534517. The reversal of 216534516 is 615435612.

216534516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216534511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49240 + ... + 53456.

It is an arithmetic number, because the mean of its divisors is an integer number (11515140).

Almost surely, 2^216534516 is an apocalyptic number.

It is an amenable number.

216534516 is an abundant number, since it is smaller than the sum of its proper divisors (336192204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216534516 is a wasteful number, since it uses less digits than its factorization.

216534516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4624 (or 4622 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 216534516 is about 14715.1118242438. Note that the first 3 decimals coincide. The cubic root of 216534516 is about 600.4945145359.

The spelling of 216534516 in words is "two hundred sixteen million, five hundred thirty-four thousand, five hundred sixteen".