531315212412 has 36 divisors (see below), whose sum is σ = 1308418913256. Its totient is φ = 167783749920.

The previous prime is 531315212411. The next prime is 531315212429. The reversal of 531315212412 is 214212513135.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 531315212412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531315212411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61320139 + ... + 61328802.

Almost surely, 2^531315212412 is an apocalyptic number.

It is an amenable number.

531315212412 is an abundant number, since it is smaller than the sum of its proper divisors (777103700844).

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

531315212412 is a wasteful number, since it uses less digits than its factorization.

531315212412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122648986 (or 122648965 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

Adding to 531315212412 its reverse (214212513135), we get a palindrome (745527725547).

The spelling of 531315212412 in words is "five hundred thirty-one billion, three hundred fifteen million, two hundred twelve thousand, four hundred twelve".