531505213353 has 24 divisors (see below), whose sum is σ = 792719383040. Its totient is φ = 342809599680.

The previous prime is 531505213319. The next prime is 531505213423. The reversal of 531505213353 is 353312505135.

531505213353 is a `hidden beast` number, since 5 + 3 + 1 + 50 + 521 + 33 + 53 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-531505213353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531505213313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 725325 + ... + 1260597.

Almost surely, 2^531505213353 is an apocalyptic number.

It is an amenable number.

531505213353 is a deficient number, since it is larger than the sum of its proper divisors (261214169687).

531505213353 is a wasteful number, since it uses less digits than its factorization.

531505213353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538869 (or 538866 counting only the distinct ones).

The product of its (nonzero) digits is 101250, while the sum is 36.

Adding to 531505213353 its reverse (353312505135), we get a palindrome (884817718488).

The spelling of 531505213353 in words is "five hundred thirty-one billion, five hundred five million, two hundred thirteen thousand, three hundred fifty-three".