561224881 has 12 divisors (see below), whose sum is σ = 653251008. Its totient is φ = 480757032.

The previous prime is 561224789. The next prime is 561224887. The reversal of 561224881 is 188422165.

561224881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561224881 - 2⁹ = 561224369 is a prime.

It is a super-2 number, since 2×561224881² = 629946734106928322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561224881.

It is not an unprimeable number, because it can be changed into a prime (561224887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127540 + ... + 131866.

It is an arithmetic number, because the mean of its divisors is an integer number (54437584).

Almost surely, 2^561224881 is an apocalyptic number.

It is an amenable number.

561224881 is a deficient number, since it is larger than the sum of its proper divisors (92026127).

561224881 is a wasteful number, since it uses less digits than its factorization.

561224881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6988 (or 6981 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 561224881 is about 23690.1853306385. The cubic root of 561224881 is about 824.8575847222.

The spelling of 561224881 in words is "five hundred sixty-one million, two hundred twenty-four thousand, eight hundred eighty-one".