216525612 has 12 divisors (see below), whose sum is σ = 505226456. Its totient is φ = 72175200.

The previous prime is 216525601. The next prime is 216525619.

216525612 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 216525612.

It is not an unprimeable number, because it can be changed into a prime (216525619) by changing a digit.

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, 9021889 + ... + 9021912.

Almost surely, 2^216525612 is an apocalyptic number.

It is an amenable number.

216525612 is an abundant number, since it is smaller than the sum of its proper divisors (288700844).

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

216525612 is a wasteful number, since it uses less digits than its factorization.

216525612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18043808 (or 18043806 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 216525612 is about 14714.8092750127. The cubic root of 216525612 is about 600.4862835518.

The spelling of 216525612 in words is "two hundred sixteen million, five hundred twenty-five thousand, six hundred twelve".