561216285 has 48 divisors (see below), whose sum is σ = 1113480576. Its totient is φ = 256155264.

The previous prime is 561216277. The next prime is 561216301. The reversal of 561216285 is 582612165.

561216285 is a `hidden beast` number, since 5 + 6 + 1 + 21 + 628 + 5 = 666.

It is not a de Polignac number, because 561216285 - 2³ = 561216277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 313162 + ... + 314948.

It is an arithmetic number, because the mean of its divisors is an integer number (23197512).

Almost surely, 2^561216285 is an apocalyptic number.

It is an amenable number.

561216285 is a deficient number, since it is larger than the sum of its proper divisors (552264291).

561216285 is a wasteful number, since it uses less digits than its factorization.

561216285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802 (or 2799 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 561216285 is about 23690.0039046008. The cubic root of 561216285 is about 824.8533733907.

The spelling of 561216285 in words is "five hundred sixty-one million, two hundred sixteen thousand, two hundred eighty-five".