2016021216 has 48 divisors (see below), whose sum is σ = 5773154688. Its totient is φ = 610915200.

The previous prime is 2016021197. The next prime is 2016021221. The reversal of 2016021216 is 6121206102.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 2016021192 and 2016021201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 953500 + ... + 955611.

It is an arithmetic number, because the mean of its divisors is an integer number (120274056).

Almost surely, 2^2016021216 is an apocalyptic number.

It is an amenable number.

2016021216 is an abundant number, since it is smaller than the sum of its proper divisors (3757133472).

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

2016021216 is a wasteful number, since it uses less digits than its factorization.

2016021216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909135 (or 1909127 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2016021216 is about 44900.1248996036. The cubic root of 2016021216 is about 1263.2763509934.

Adding to 2016021216 its reverse (6121206102), we get a palindrome (8137227318).

The spelling of 2016021216 in words is "two billion, sixteen million, twenty-one thousand, two hundred sixteen".