2216228661 has 16 divisors (see below), whose sum is σ = 3305051520. Its totient is φ = 1467698400.

The previous prime is 2216228653. The next prime is 2216228683. The reversal of 2216228661 is 1668226122.

It is a happy number.

2216228661 is a `hidden beast` number, since 2 + 21 + 622 + 8 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 2216228661 - 2³ = 2216228653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216228611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267720 + ... + 275873.

It is an arithmetic number, because the mean of its divisors is an integer number (206565720).

Almost surely, 2^2216228661 is an apocalyptic number.

It is an amenable number.

2216228661 is a deficient number, since it is larger than the sum of its proper divisors (1088822859).

2216228661 is a wasteful number, since it uses less digits than its factorization.

2216228661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543753 (or 543747 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 2216228661 is about 47076.8378398550. The cubic root of 2216228661 is about 1303.7816241153.

The spelling of 2216228661 in words is "two billion, two hundred sixteen million, two hundred twenty-eight thousand, six hundred sixty-one".