500501561131 has 24 divisors (see below), whose sum is σ = 593431097040. Its totient is φ = 418439548800.

The previous prime is 500501561123. The next prime is 500501561141. The reversal of 500501561131 is 131165105005.

It is not a de Polignac number, because 500501561131 - 2³ = 500501561123 is a prime.

It is a super-2 number, since 2×500501561131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 500501561131.

It is not an unprimeable number, because it can be changed into a prime (500501561141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 360 + ... + 1000501.

It is an arithmetic number, because the mean of its divisors is an integer number (24726295710).

Almost surely, 2^500501561131 is an apocalyptic number.

500501561131 is a deficient number, since it is larger than the sum of its proper divisors (92929535909).

500501561131 is a wasteful number, since it uses less digits than its factorization.

500501561131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001167 (or 1001154 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 28.

Adding to 500501561131 its reverse (131165105005), we get a palindrome (631666666136).

The spelling of 500501561131 in words is "five hundred billion, five hundred one million, five hundred sixty-one thousand, one hundred thirty-one".