561305112 has 32 divisors (see below), whose sum is σ = 1421030400. Its totient is φ = 184732704.

The previous prime is 561305093. The next prime is 561305117. The reversal of 561305112 is 211503165.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561305117) 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 7 ways as a sum of consecutive naturals, for example, 146128 + ... + 149919.

It is an arithmetic number, because the mean of its divisors is an integer number (44407200).

Almost surely, 2^561305112 is an apocalyptic number.

It is an amenable number.

561305112 is an abundant number, since it is smaller than the sum of its proper divisors (859725288).

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

561305112 is a wasteful number, since it uses less digits than its factorization.

561305112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296135 (or 296131 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 561305112 is about 23691.8786085021. The cubic root of 561305112 is about 824.8968892255.

Adding to 561305112 its reverse (211503165), we get a palindrome (772808277).

The spelling of 561305112 in words is "five hundred sixty-one million, three hundred five thousand, one hundred twelve".