221093903 has 8 divisors (see below), whose sum is σ = 227239680. Its totient is φ = 215031960.

The previous prime is 221093897. The next prime is 221093911. The reversal of 221093903 is 309390122.

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 221093903 - 2⁶ = 221093839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221093003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15593 + ... + 26178.

It is an arithmetic number, because the mean of its divisors is an integer number (28404960).

Almost surely, 2^221093903 is an apocalyptic number.

221093903 is a deficient number, since it is larger than the sum of its proper divisors (6145777).

221093903 is an equidigital number, since it uses as much as digits as its factorization.

221093903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41917.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 221093903 is about 14869.2267115678. The cubic root of 221093903 is about 604.6799782816.

The spelling of 221093903 in words is "two hundred twenty-one million, ninety-three thousand, nine hundred three".