221056559 has 8 divisors (see below), whose sum is σ = 234200880. Its totient is φ = 207927936.

The previous prime is 221056553. The next prime is 221056571. The reversal of 221056559 is 955650122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221056559 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 (221056553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37892 + ... + 43334.

It is an arithmetic number, because the mean of its divisors is an integer number (29275110).

Almost surely, 2^221056559 is an apocalyptic number.

221056559 is a deficient number, since it is larger than the sum of its proper divisors (13144321).

221056559 is a wasteful number, since it uses less digits than its factorization.

221056559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 221056559 is about 14867.9709106522. The cubic root of 221056559 is about 604.6459317516.

The spelling of 221056559 in words is "two hundred twenty-one million, fifty-six thousand, five hundred fifty-nine".