531113013 has 12 divisors (see below), whose sum is σ = 767585260. Its totient is φ = 353880576.

The previous prime is 531112993. The next prime is 531113017. The reversal of 531113013 is 310311135.

531113013 is a `hidden beast` number, since 531 + 1 + 130 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 128187684 + 402925329 = 11322^2 + 20073^2 .

It is not a de Polignac number, because 531113013 - 2⁶ = 531112949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531113017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2133 + ... + 32661.

Almost surely, 2^531113013 is an apocalyptic number.

It is an amenable number.

531113013 is a deficient number, since it is larger than the sum of its proper divisors (236472247).

531113013 is a wasteful number, since it uses less digits than its factorization.

531113013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32468 (or 32465 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 531113013 is about 23045.8892863782. The cubic root of 531113013 is about 809.8333310485.

Adding to 531113013 its reverse (310311135), we get a palindrome (841424148).

The spelling of 531113013 in words is "five hundred thirty-one million, one hundred thirteen thousand, thirteen".