6221221227 has 16 divisors (see below), whose sum is σ = 9925595680. Its totient is φ = 3828443616.

The previous prime is 6221221211. The next prime is 6221221261. The reversal of 6221221227 is 7221221226.

6221221227 is a `hidden beast` number, since 622 + 1 + 2 + 2 + 12 + 27 = 666.

It is not a de Polignac number, because 6221221227 - 2⁴ = 6221221211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 6221221227.

It is not an unprimeable number, because it can be changed into a prime (6221223227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8861788 + ... + 8862489.

It is an arithmetic number, because the mean of its divisors is an integer number (620349730).

Almost surely, 2^6221221227 is an apocalyptic number.

6221221227 is a deficient number, since it is larger than the sum of its proper divisors (3704374453).

6221221227 is a wasteful number, since it uses less digits than its factorization.

6221221227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17724299 (or 17724293 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 6221221227 is about 78874.7185541730. The cubic root of 6221221227 is about 1839.1841478960.

Subtracting 6221221227 from its reverse (7221221226), we obtain a palindrome (999999999).

The spelling of 6221221227 in words is "six billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-seven".