561243306 has 32 divisors (see below), whose sum is σ = 1241509248. Its totient is φ = 168022080.

The previous prime is 561243259. The next prime is 561243311. The reversal of 561243306 is 603342165.

561243306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94350 + ... + 100121.

It is an arithmetic number, because the mean of its divisors is an integer number (38797164).

Almost surely, 2^561243306 is an apocalyptic number.

561243306 is an abundant number, since it is smaller than the sum of its proper divisors (680265942).

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

561243306 is a wasteful number, since it uses less digits than its factorization.

561243306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194526.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 561243306 is about 23690.5742015680. The cubic root of 561243306 is about 824.8666113086.

The spelling of 561243306 in words is "five hundred sixty-one million, two hundred forty-three thousand, three hundred six".