2816221365 has 40 divisors (see below), whose sum is σ = 5097426048. Its totient is φ = 1487380320.

The previous prime is 2816221357. The next prime is 2816221391. The reversal of 2816221365 is 5631226182.

2816221365 is a `hidden beast` number, since 28 + 1 + 622 + 1 + 3 + 6 + 5 = 666.

2816221365 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2816221365 - 2³ = 2816221357 is a prime.

It is a super-2 number, since 2×2816221365² = 15862205553364926450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7960 + ... + 75470.

Almost surely, 2^2816221365 is an apocalyptic number.

It is an amenable number.

2816221365 is a deficient number, since it is larger than the sum of its proper divisors (2281204683).

2816221365 is a wasteful number, since it uses less digits than its factorization.

2816221365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67631 (or 67622 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 2816221365 is about 53068.0823565352. The cubic root of 2816221365 is about 1412.1763357915.

The spelling of 2816221365 in words is "two billion, eight hundred sixteen million, two hundred twenty-one thousand, three hundred sixty-five".