564550221 has 8 divisors (see below), whose sum is σ = 778690080. Its totient is φ = 363388592.

The previous prime is 564550199. The next prime is 564550243. The reversal of 564550221 is 122055465.

It is an interprime number because it is at equal distance from previous prime (564550199) and next prime (564550243).

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

It is a cyclic number.

It is not a de Polignac number, because 564550221 - 2¹⁸ = 564288077 is a prime.

It is a super-2 number, since 2×564550221² = 637433904062297682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564550321) 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, 3244455 + ... + 3244628.

It is an arithmetic number, because the mean of its divisors is an integer number (97336260).

Almost surely, 2^564550221 is an apocalyptic number.

It is an amenable number.

564550221 is a deficient number, since it is larger than the sum of its proper divisors (214139859).

564550221 is a wasteful number, since it uses less digits than its factorization.

564550221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489115.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 564550221 is about 23760.2655919499. The cubic root of 564550221 is about 826.4835118393.

The spelling of 564550221 in words is "five hundred sixty-four million, five hundred fifty thousand, two hundred twenty-one".