4133228221 has 4 divisors (see below), whose sum is σ = 4133742844. Its totient is φ = 4132713600.

The previous prime is 4133228201. The next prime is 4133228243. The reversal of 4133228221 is 1228223314.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1428084100 + 2705144121 = 37790^2 + 52011^2 .

It is a cyclic number.

It is not a de Polignac number, because 4133228221 - 2⁷ = 4133228093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4133228221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4133228201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245070 + ... + 261391.

It is an arithmetic number, because the mean of its divisors is an integer number (1033435711).

Almost surely, 2^4133228221 is an apocalyptic number.

It is an amenable number.

4133228221 is a deficient number, since it is larger than the sum of its proper divisors (514623).

4133228221 is an equidigital number, since it uses as much as digits as its factorization.

4133228221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514622.

The product of its digits is 4608, while the sum is 28.

The square root of 4133228221 is about 64290.1875949977. The cubic root of 4133228221 is about 1604.8328123649.

The spelling of 4133228221 in words is "four billion, one hundred thirty-three million, two hundred twenty-eight thousand, two hundred twenty-one".