500105561 has 4 divisors (see below), whose sum is σ = 500444724. Its totient is φ = 499766400.

The previous prime is 500105549. The next prime is 500105563. The reversal of 500105561 is 165501005.

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

It can be written as a sum of positive squares in 2 ways, for example, as 352725961 + 147379600 = 18781^2 + 12140^2 .

It is a cyclic number.

It is not a de Polignac number, because 500105561 - 2⁶ = 500105497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500105563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167360 + ... + 170321.

It is an arithmetic number, because the mean of its divisors is an integer number (125111181).

Almost surely, 2^500105561 is an apocalyptic number.

It is an amenable number.

500105561 is a deficient number, since it is larger than the sum of its proper divisors (339163).

500105561 is a wasteful number, since it uses less digits than its factorization.

500105561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339162.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 500105561 is about 22363.0400661449. The cubic root of 500105561 is about 793.7563779346.

Adding to 500105561 its reverse (165501005), we get a palindrome (665606566).

The spelling of 500105561 in words is "five hundred million, one hundred five thousand, five hundred sixty-one".