4436221081 has 6 divisors (see below), whose sum is σ = 4480589246. Its totient is φ = 4392288000.

The previous prime is 4436221067. The next prime is 4436221159. The reversal of 4436221081 is 1801226344.

It can be written as a sum of positive squares in 3 ways, for example, as 3621632400 + 814588681 = 60180^2 + 28541^2 .

It is not a de Polignac number, because 4436221081 - 2⁷ = 4436220953 is a prime.

It is a super-2 number, since 2×4436221081² = 39360114959017617122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4436221051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207240 + ... + 227641.

Almost surely, 2^4436221081 is an apocalyptic number.

It is an amenable number.

4436221081 is a deficient number, since it is larger than the sum of its proper divisors (44368165).

4436221081 is an equidigital number, since it uses as much as digits as its factorization.

4436221081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435083 (or 434982 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 4436221081 is about 66604.9628856589. The cubic root of 4436221081 is about 1643.1267289284.

The spelling of 4436221081 in words is "four billion, four hundred thirty-six million, two hundred twenty-one thousand, eighty-one".