221027833 has 12 divisors (see below), whose sum is σ = 239941548. Its totient is φ = 203511360.

The previous prime is 221027813. The next prime is 221027903. The reversal of 221027833 is 338720122.

It can be written as a sum of positive squares in 6 ways, for example, as 109767529 + 111260304 = 10477^2 + 10548^2 .

It is not a de Polignac number, because 221027833 - 2⁹ = 221027321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221027813) 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 11 ways as a sum of consecutive naturals, for example, 76491 + ... + 79327.

It is an arithmetic number, because the mean of its divisors is an integer number (19995129).

Almost surely, 2^221027833 is an apocalyptic number.

It is an amenable number.

221027833 is a deficient number, since it is larger than the sum of its proper divisors (18913715).

221027833 is a wasteful number, since it uses less digits than its factorization.

221027833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324 (or 3311 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 221027833 is about 14867.0048429400. The cubic root of 221027833 is about 604.6197396441.

Adding to 221027833 its reverse (338720122), we get a palindrome (559747955).

The spelling of 221027833 in words is "two hundred twenty-one million, twenty-seven thousand, eight hundred thirty-three".