561559216 has 20 divisors (see below), whose sum is σ = 1102927672. Its totient is φ = 276932736.

The previous prime is 561559177. The next prime is 561559217. The reversal of 561559216 is 612955165.

It is not an unprimeable number, because it can be changed into a prime (561559217) 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, 239226 + ... + 241561.

Almost surely, 2^561559216 is an apocalyptic number.

It is an amenable number.

561559216 is a deficient number, since it is larger than the sum of its proper divisors (541368456).

561559216 is a wasteful number, since it uses less digits than its factorization.

561559216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480868 (or 480862 counting only the distinct ones).

The product of its digits is 81000, while the sum is 40.

The square root of 561559216 is about 23697.2406832526. The cubic root of 561559216 is about 825.0213479630.

The spelling of 561559216 in words is "five hundred sixty-one million, five hundred fifty-nine thousand, two hundred sixteen".