561500115 has 16 divisors (see below), whose sum is σ = 980073216. Its totient is φ = 272242400.

The previous prime is 561500099. The next prime is 561500119. The reversal of 561500115 is 511005165.

It is not a de Polignac number, because 561500115 - 2⁴ = 561500099 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (561500119) 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 15 ways as a sum of consecutive naturals, for example, 1701351 + ... + 1701680.

It is an arithmetic number, because the mean of its divisors is an integer number (61254576).

Almost surely, 2^561500115 is an apocalyptic number.

561500115 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

561500115 is a deficient number, since it is larger than the sum of its proper divisors (418573101).

561500115 is a wasteful number, since it uses less digits than its factorization.

561500115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403050.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 561500115 is about 23695.9936487162. The cubic root of 561500115 is about 824.9924039705.

The spelling of 561500115 in words is "five hundred sixty-one million, five hundred thousand, one hundred fifteen".