561665224 has 8 divisors (see below), whose sum is σ = 1053122310. Its totient is φ = 280832608.

The previous prime is 561665189. The next prime is 561665231. The reversal of 561665224 is 422566165.

It can be written as a sum of positive squares in only one way, i.e., 560837124 + 828100 = 23682^2 + 910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35104069 + ... + 35104084.

Almost surely, 2^561665224 is an apocalyptic number.

It is an amenable number.

561665224 is a deficient number, since it is larger than the sum of its proper divisors (491457086).

561665224 is a wasteful number, since it uses less digits than its factorization.

561665224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70208159 (or 70208155 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 561665224 is about 23699.4772938139. The cubic root of 561665224 is about 825.0732589980.

The spelling of 561665224 in words is "five hundred sixty-one million, six hundred sixty-five thousand, two hundred twenty-four".