531132115523 has 8 divisors (see below), whose sum is σ = 574340611392. Its totient is φ = 489253111936.

The previous prime is 531132115499. The next prime is 531132115537. The reversal of 531132115523 is 325511231135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531132115523 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 531132115523.

It is not an unprimeable number, because it can be changed into a prime (531132112523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332372240 + ... + 332373837.

It is an arithmetic number, because the mean of its divisors is an integer number (71792576424).

Almost surely, 2^531132115523 is an apocalyptic number.

531132115523 is a deficient number, since it is larger than the sum of its proper divisors (43208495869).

531132115523 is a wasteful number, since it uses less digits than its factorization.

531132115523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664746141.

The product of its digits is 13500, while the sum is 32.

Adding to 531132115523 its reverse (325511231135), we get a palindrome (856643346658).

The spelling of 531132115523 in words is "five hundred thirty-one billion, one hundred thirty-two million, one hundred fifteen thousand, five hundred twenty-three".