561305882 has 4 divisors (see below), whose sum is σ = 841958826. Its totient is φ = 280652940.

The previous prime is 561305861. The next prime is 561305887. The reversal of 561305882 is 288503165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 479566201 + 81739681 = 21899^2 + 9041^2 .

It is not an unprimeable number, because it can be changed into a prime (561305887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140326469 + ... + 140326472.

Almost surely, 2^561305882 is an apocalyptic number.

561305882 is a deficient number, since it is larger than the sum of its proper divisors (280652944).

561305882 is a wasteful number, since it uses less digits than its factorization.

561305882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280652943.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 561305882 is about 23691.8948587908. The cubic root of 561305882 is about 824.8972664240.

The spelling of 561305882 in words is "five hundred sixty-one million, three hundred five thousand, eight hundred eighty-two".