2216581362 has 66 divisors (see below), whose sum is σ = 5023949133. Its totient is φ = 733467312.

The previous prime is 2216581351. The next prime is 2216581399. The reversal of 2216581362 is 2631856122.

2216581362 is a `hidden beast` number, since 2 + 2 + 16 + 581 + 3 + 62 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2199516201 + 17065161 = 46899^2 + 4131^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=33291.

It is an unprimeable number.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 16179358 + ... + 16179494.

Almost surely, 2^2216581362 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2216581362

2216581362 is an abundant number, since it is smaller than the sum of its proper divisors (2807367771).

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

2216581362 is an frugal number, since it uses more digits than its factorization.

2216581362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 142 counting only the distinct ones).

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

The square root of 2216581362 is about 47080.5837049627. The cubic root of 2216581362 is about 1303.8507837495.

The spelling of 2216581362 in words is "two billion, two hundred sixteen million, five hundred eighty-one thousand, three hundred sixty-two".