531320512513 has 16 divisors (see below), whose sum is σ = 609651440640. Its totient is φ = 453599269200.

The previous prime is 531320512469. The next prime is 531320512523. The reversal of 531320512513 is 315215023135.

It is not a de Polignac number, because 531320512513 - 2³³ = 522730577921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531320512523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2277618 + ... + 2500036.

It is an arithmetic number, because the mean of its divisors is an integer number (38103215040).

Almost surely, 2^531320512513 is an apocalyptic number.

It is an amenable number.

531320512513 is a deficient number, since it is larger than the sum of its proper divisors (78330928127).

531320512513 is a wasteful number, since it uses less digits than its factorization.

531320512513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223788.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 531320512513 its reverse (315215023135), we get a palindrome (846535535648).

The spelling of 531320512513 in words is "five hundred thirty-one billion, three hundred twenty million, five hundred twelve thousand, five hundred thirteen".