221255633305 has 8 divisors (see below), whose sum is σ = 303436297152. Its totient is φ = 151718148528.

The previous prime is 221255633303. The next prime is 221255633317. The reversal of 221255633305 is 503336552122.

221255633305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221255633305 - 2¹ = 221255633303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221255633303) 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 7 ways as a sum of consecutive naturals, for example, 3160794727 + ... + 3160794796.

It is an arithmetic number, because the mean of its divisors is an integer number (37929537144).

Almost surely, 2^221255633305 is an apocalyptic number.

It is an amenable number.

221255633305 is a deficient number, since it is larger than the sum of its proper divisors (82180663847).

221255633305 is an equidigital number, since it uses as much as digits as its factorization.

221255633305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6321589535.

The product of its (nonzero) digits is 162000, while the sum is 37.

The spelling of 221255633305 in words is "two hundred twenty-one billion, two hundred fifty-five million, six hundred thirty-three thousand, three hundred five".