561543232 has 14 divisors (see below), whose sum is σ = 1114312478. Its totient is φ = 280771584.

The previous prime is 561543221. The next prime is 561543239. The reversal of 561543232 is 232345165.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 504631296 + 56911936 = 22464^2 + 7544^2 .

It is a junction number, because it is equal to n+sod(n) for n = 561543194 and 561543203.

It is not an unprimeable number, because it can be changed into a prime (561543239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4386993 + ... + 4387120.

Almost surely, 2^561543232 is an apocalyptic number.

It is an amenable number.

561543232 is a deficient number, since it is larger than the sum of its proper divisors (552769246).

561543232 is an equidigital number, since it uses as much as digits as its factorization.

561543232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8774125 (or 8774115 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 561543232 is about 23696.9034263973. The cubic root of 561543232 is about 825.0135201947.

Adding to 561543232 its reverse (232345165), we get a palindrome (793888397).

The spelling of 561543232 in words is "five hundred sixty-one million, five hundred forty-three thousand, two hundred thirty-two".