531243520211 has 6 divisors (see below), whose sum is σ = 555345306180. Its totient is φ = 508145975348.

The previous prime is 531243520201. The next prime is 531243520261. The reversal of 531243520211 is 112025342135.

It is not a de Polignac number, because 531243520211 - 2⁶ = 531243520147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531243520201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 502120001 + ... + 502121058.

It is an arithmetic number, because the mean of its divisors is an integer number (92557551030).

Almost surely, 2^531243520211 is an apocalyptic number.

531243520211 is a deficient number, since it is larger than the sum of its proper divisors (24101785969).

531243520211 is a wasteful number, since it uses less digits than its factorization.

531243520211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004241105 (or 1004241082 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 531243520211 its reverse (112025342135), we get a palindrome (643268862346).

The spelling of 531243520211 in words is "five hundred thirty-one billion, two hundred forty-three million, five hundred twenty thousand, two hundred eleven".