216015212 has 24 divisors (see below), whose sum is σ = 433411104. Its totient is φ = 92282112.

The previous prime is 216015211. The next prime is 216015257. The reversal of 216015212 is 212510612.

It is not an unprimeable number, because it can be changed into a prime (216015211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3293 + ... + 21044.

It is an arithmetic number, because the mean of its divisors is an integer number (18058796).

Almost surely, 2^216015212 is an apocalyptic number.

It is an amenable number.

216015212 is an abundant number, since it is smaller than the sum of its proper divisors (217395892).

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

216015212 is a wasteful number, since it uses less digits than its factorization.

216015212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24665 (or 24663 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 216015212 is about 14697.4559703372. The cubic root of 216015212 is about 600.0140848545.

Adding to 216015212 its reverse (212510612), we get a palindrome (428525824).

The spelling of 216015212 in words is "two hundred sixteen million, fifteen thousand, two hundred twelve".