216525524221 has 8 divisors (see below), whose sum is σ = 226013037120. Its totient is φ = 207044124672.

The previous prime is 216525524213. The next prime is 216525524269. The reversal of 216525524221 is 122425525612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216525524221 - 2³ = 216525524213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216525524291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455876 + ... + 1597693.

It is an arithmetic number, because the mean of its divisors is an integer number (28251629640).

Almost surely, 2^216525524221 is an apocalyptic number.

It is an amenable number.

216525524221 is a deficient number, since it is larger than the sum of its proper divisors (9487512899).

216525524221 is a wasteful number, since it uses less digits than its factorization.

216525524221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056675.

The product of its digits is 96000, while the sum is 37.

The spelling of 216525524221 in words is "two hundred sixteen billion, five hundred twenty-five million, five hundred twenty-four thousand, two hundred twenty-one".