216524012 has 12 divisors (see below), whose sum is σ = 379098720. Its totient is φ = 108210096.

The previous prime is 216524003. The next prime is 216524039. The reversal of 216524012 is 210425612.

It is a happy number.

It is a super-2 number, since 2×216524012² = 93765295545152288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2687 + ... + 20982.

It is an arithmetic number, because the mean of its divisors is an integer number (31591560).

Almost surely, 2^216524012 is an apocalyptic number.

It is an amenable number.

216524012 is a deficient number, since it is larger than the sum of its proper divisors (162574708).

216524012 is a wasteful number, since it uses less digits than its factorization.

216524012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25960 (or 25958 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 216524012 is about 14714.7549079147. The cubic root of 216524012 is about 600.4848044652.

Adding to 216524012 its reverse (210425612), we get a palindrome (426949624).

The spelling of 216524012 in words is "two hundred sixteen million, five hundred twenty-four thousand, twelve".