531321312212 has 12 divisors (see below), whose sum is σ = 984507137460. Its totient is φ = 250033558656.

The previous prime is 531321312157. The next prime is 531321312233. The reversal of 531321312212 is 212213123135.

It can be written as a sum of positive squares in 2 ways, for example, as 191742397456 + 339578914756 = 437884^2 + 582734^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3906774287 + ... + 3906774422.

It is an arithmetic number, because the mean of its divisors is an integer number (82042261455).

Almost surely, 2^531321312212 is an apocalyptic number.

It is an amenable number.

531321312212 is a deficient number, since it is larger than the sum of its proper divisors (453185825248).

531321312212 is a wasteful number, since it uses less digits than its factorization.

531321312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7813548730 (or 7813548728 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

Adding to 531321312212 its reverse (212213123135), we get a palindrome (743534435347).

The spelling of 531321312212 in words is "five hundred thirty-one billion, three hundred twenty-one million, three hundred twelve thousand, two hundred twelve".