2016215221 has 8 divisors (see below), whose sum is σ = 2066468544. Its totient is φ = 1966013280.

The previous prime is 2016215171. The next prime is 2016215239. The reversal of 2016215221 is 1225126102.

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

It is a cyclic number.

It is not a de Polignac number, because 2016215221 - 2⁷ = 2016215093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2016215192 and 2016215201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016215281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73786 + ... + 97348.

It is an arithmetic number, because the mean of its divisors is an integer number (258308568).

Almost surely, 2^2016215221 is an apocalyptic number.

It is an amenable number.

2016215221 is a deficient number, since it is larger than the sum of its proper divisors (50253323).

2016215221 is a wasteful number, since it uses less digits than its factorization.

2016215221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25691.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 2016215221 is about 44902.2852536483. The cubic root of 2016215221 is about 1263.3168720728.

The spelling of 2016215221 in words is "two billion, sixteen million, two hundred fifteen thousand, two hundred twenty-one".