566849221 has 4 divisors (see below), whose sum is σ = 567239200. Its totient is φ = 566459244.

The previous prime is 566849209. The next prime is 566849233. The reversal of 566849221 is 122948665.

566849221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (566849209) and next prime (566849233).

It is a cyclic number.

It is not a de Polignac number, because 566849221 - 2¹³ = 566841029 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 (566849201) 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, 192801 + ... + 195718.

It is an arithmetic number, because the mean of its divisors is an integer number (141809800).

Almost surely, 2^566849221 is an apocalyptic number.

It is an amenable number.

566849221 is a deficient number, since it is larger than the sum of its proper divisors (389979).

566849221 is a wasteful number, since it uses less digits than its factorization.

566849221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389978.

The product of its digits is 207360, while the sum is 43.

The square root of 566849221 is about 23808.5955276661. The cubic root of 566849221 is about 827.6038799500.

The spelling of 566849221 in words is "five hundred sixty-six million, eight hundred forty-nine thousand, two hundred twenty-one".