561530313 has 40 divisors (see below), whose sum is σ = 886533120. Its totient is φ = 353224800.

The previous prime is 561530297. The next prime is 561530357. The reversal of 561530313 is 313035165.

561530313 is a `hidden beast` number, since 5 + 615 + 30 + 3 + 13 = 666.

It is not a de Polignac number, because 561530313 - 2⁴ = 561530297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (561530363) by changing a digit.

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 in 39 ways as a sum of consecutive naturals, for example, 487288 + ... + 488438.

It is an arithmetic number, because the mean of its divisors is an integer number (22163328).

Almost surely, 2^561530313 is an apocalyptic number.

It is an amenable number.

561530313 is a deficient number, since it is larger than the sum of its proper divisors (325002807).

561530313 is a wasteful number, since it uses less digits than its factorization.

561530313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499 (or 1490 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

The square root of 561530313 is about 23696.6308364712. The cubic root of 561530313 is about 825.0071933257.

Adding to 561530313 its reverse (313035165), we get a palindrome (874565478).

The spelling of 561530313 in words is "five hundred sixty-one million, five hundred thirty thousand, three hundred thirteen".