531321023212 has 48 divisors (see below), whose sum is σ = 1148112705600. Its totient is φ = 214314352896.

The previous prime is 531321023209. The next prime is 531321023237. The reversal of 531321023212 is 212320123135.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11366683 + ... + 11413330.

It is an arithmetic number, because the mean of its divisors is an integer number (23919014700).

Almost surely, 2^531321023212 is an apocalyptic number.

It is an amenable number.

531321023212 is an abundant number, since it is smaller than the sum of its proper divisors (616791682388).

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

531321023212 is a wasteful number, since it uses less digits than its factorization.

531321023212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22780055 (or 22780039 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 531321023212 its reverse (212320123135), we get a palindrome (743641146347).

The spelling of 531321023212 in words is "five hundred thirty-one billion, three hundred twenty-one million, twenty-three thousand, two hundred twelve".