531243520212 has 48 divisors (see below), whose sum is σ = 1314790928640. Its totient is φ = 166371689472.

The previous prime is 531243520201. The next prime is 531243520261. The reversal of 531243520212 is 212025342135.

It is a self number, because there is not a number n which added to its sum of digits gives 531243520212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2172268 + ... + 2404419.

It is an arithmetic number, because the mean of its divisors is an integer number (27391477680).

Almost surely, 2^531243520212 is an apocalyptic number.

It is an amenable number.

531243520212 is an abundant number, since it is smaller than the sum of its proper divisors (783547408428).

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

531243520212 is a wasteful number, since it uses less digits than its factorization.

531243520212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577280 (or 4577278 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 531243520212 its reverse (212025342135), we get a palindrome (743268862347).

The spelling of 531243520212 in words is "five hundred thirty-one billion, two hundred forty-three million, five hundred twenty thousand, two hundred twelve".