531131211247163 has 4 divisors (see below), whose sum is σ = 531131258386728. Its totient is φ = 531131164107600.

The previous prime is 531131211247159. The next prime is 531131211247177. The reversal of 531131211247163 is 361742112131135.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 531131211247163 - 2² = 531131211247159 is a prime.

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 531131211247163.

It is not an unprimeable number, because it can be changed into a prime (531131211247103) 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, 4374920 + ... + 32884682.

It is an arithmetic number, because the mean of its divisors is an integer number (132782814596682).

Almost surely, 2^{531131211247163} is an apocalyptic number.

531131211247163 is a deficient number, since it is larger than the sum of its proper divisors (47139565).

531131211247163 is a wasteful number, since it uses less digits than its factorization.

531131211247163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47139564.

The product of its digits is 90720, while the sum is 41.

Adding to 531131211247163 its reverse (361742112131135), we get a palindrome (892873323378298).

The spelling of 531131211247163 in words is "five hundred thirty-one trillion, one hundred thirty-one billion, two hundred eleven million, two hundred forty-seven thousand, one hundred sixty-three".