531130012 has 60 divisors (see below), whose sum is σ = 1122304680. Its totient is φ = 219662688.

The previous prime is 531130001. The next prime is 531130021. The reversal of 531130012 is 210031135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 277563 + ... + 279469.

It is an arithmetic number, because the mean of its divisors is an integer number (18705078).

Almost surely, 2^531130012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531130012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561152340).

531130012 is an abundant number, since it is smaller than the sum of its proper divisors (591174668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531130012 is a wasteful number, since it uses less digits than its factorization.

531130012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 531130012 is about 23046.2580910655. The cubic root of 531130012 is about 809.8419708983.

Adding to 531130012 its reverse (210031135), we get a palindrome (741161147).

The spelling of 531130012 in words is "five hundred thirty-one million, one hundred thirty thousand, twelve".