561500415 has 48 divisors (see below), whose sum is σ = 1114371648. Its totient is φ = 256209408.

The previous prime is 561500389. The next prime is 561500417. The reversal of 561500415 is 514005165.

It is a happy number.

561500415 is a `hidden beast` number, since 5 + 615 + 0 + 0 + 41 + 5 = 666.

It is a Cunningham number, because it is equal to 23696²-1.

It is not a de Polignac number, because 561500415 - 2⁵ = 561500383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561500417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 211939 + ... + 214571.

It is an arithmetic number, because the mean of its divisors is an integer number (23216076).

Almost surely, 2^561500415 is an apocalyptic number.

561500415 is a deficient number, since it is larger than the sum of its proper divisors (552871233).

561500415 is a wasteful number, since it uses less digits than its factorization.

561500415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328 (or 3325 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 561500415 is about 23695.9999788994. Note that the first 4 decimals coincide. The cubic root of 561500415 is about 824.9925508969.

The spelling of 561500415 in words is "five hundred sixty-one million, five hundred thousand, four hundred fifteen".