563303221 has 16 divisors (see below), whose sum is σ = 628709760. Its totient is φ = 501117120.

The previous prime is 563303197. The next prime is 563303233. The reversal of 563303221 is 122303365.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 563303221 - 2¹⁷ = 563172149 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 (563304221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279106 + ... + 281116.

It is an arithmetic number, because the mean of its divisors is an integer number (39294360).

Almost surely, 2^563303221 is an apocalyptic number.

It is an amenable number.

563303221 is a deficient number, since it is larger than the sum of its proper divisors (65406539).

563303221 is a wasteful number, since it uses less digits than its factorization.

563303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 563303221 is about 23734.0097960711. The cubic root of 563303221 is about 825.8745405076.

Adding to 563303221 its reverse (122303365), we get a palindrome (685606586).

The spelling of 563303221 in words is "five hundred sixty-three million, three hundred three thousand, two hundred twenty-one".