561719221 has 8 divisors (see below), whose sum is σ = 643276224. Its totient is φ = 480490080.

The previous prime is 561719189. The next prime is 561719233. The reversal of 561719221 is 122917165.

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

It is not a de Polignac number, because 561719221 - 2⁵ = 561719189 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 (561719251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78280 + ... + 85153.

It is an arithmetic number, because the mean of its divisors is an integer number (80409528).

Almost surely, 2^561719221 is an apocalyptic number.

It is an amenable number.

561719221 is a deficient number, since it is larger than the sum of its proper divisors (81557003).

561719221 is a wasteful number, since it uses less digits than its factorization.

561719221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163931.

The product of its digits is 7560, while the sum is 34.

The square root of 561719221 is about 23700.6164687757. The cubic root of 561719221 is about 825.0996982666.

The spelling of 561719221 in words is "five hundred sixty-one million, seven hundred nineteen thousand, two hundred twenty-one".