221553106 has 8 divisors (see below), whose sum is σ = 332405424. Its totient is φ = 110751300.

The previous prime is 221553097. The next prime is 221553109. The reversal of 221553106 is 601355122.

221553106 is digitally balanced in base 3, 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 not an unprimeable number, because it can be changed into a prime (221553109) 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 3 ways as a sum of consecutive naturals, for example, 1501 + ... + 21103.

It is an arithmetic number, because the mean of its divisors is an integer number (41550678).

Almost surely, 2^221553106 is an apocalyptic number.

221553106 is a deficient number, since it is larger than the sum of its proper divisors (110852318).

221553106 is a wasteful number, since it uses less digits than its factorization.

221553106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25256.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 221553106 is about 14884.6600901734. The cubic root of 221553106 is about 605.0983206553.

The spelling of 221553106 in words is "two hundred twenty-one million, five hundred fifty-three thousand, one hundred six".