216225522612 has 72 divisors (see below), whose sum is σ = 596336019552. Its totient is φ = 65514340800.

The previous prime is 216225522563. The next prime is 216225522641.

216225522612 is a `hidden beast` number, since 2 + 1 + 622 + 5 + 5 + 2 + 26 + 1 + 2 = 666.

216225522612 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 3430203 + ... + 3492669.

It is an arithmetic number, because the mean of its divisors is an integer number (8282444716).

Almost surely, 2^216225522612 is an apocalyptic number.

216225522612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216225522612 is an abundant number, since it is smaller than the sum of its proper divisors (380110496940).

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

216225522612 is a wasteful number, since it uses less digits than its factorization.

216225522612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71229 (or 71224 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

It can be divided in two parts, 216225 and 522612, that added together give a palindrome (738837).

The spelling of 216225522612 in words is "two hundred sixteen billion, two hundred twenty-five million, five hundred twenty-two thousand, six hundred twelve".