221590559 has 4 divisors (see below), whose sum is σ = 233253240. Its totient is φ = 209927880.

The previous prime is 221590553. The next prime is 221590591. The reversal of 221590559 is 955095122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221590559 - 2¹⁶ = 221525023 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 (221590553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5831312 + ... + 5831349.

It is an arithmetic number, because the mean of its divisors is an integer number (58313310).

Almost surely, 2^221590559 is an apocalyptic number.

221590559 is a deficient number, since it is larger than the sum of its proper divisors (11662681).

221590559 is a wasteful number, since it uses less digits than its factorization.

221590559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11662680.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 221590559 is about 14885.9181443403. The cubic root of 221590559 is about 605.1324155214.

The spelling of 221590559 in words is "two hundred twenty-one million, five hundred ninety thousand, five hundred fifty-nine".