561233530 has 64 divisors (see below), whose sum is σ = 1192060800. Its totient is φ = 187557120.

The previous prime is 561233527. The next prime is 561233539. The reversal of 561233530 is 35332165.

It is not an unprimeable number, because it can be changed into a prime (561233539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383941 + ... + 385399.

It is an arithmetic number, because the mean of its divisors is an integer number (18625950).

Almost surely, 2^561233530 is an apocalyptic number.

561233530 is an abundant number, since it is smaller than the sum of its proper divisors (630827270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561233530 is a wasteful number, since it uses less digits than its factorization.

561233530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759.

The product of its (nonzero) digits is 8100, while the sum is 28.

The square root of 561233530 is about 23690.3678738849. The cubic root of 561233530 is about 824.8618219759.

Adding to 561233530 its reverse (35332165), we get a palindrome (596565695).

The spelling of 561233530 in words is "five hundred sixty-one million, two hundred thirty-three thousand, five hundred thirty".