513231203252 has 12 divisors (see below), whose sum is σ = 898219313796. Its totient is φ = 256597113600.

The previous prime is 513231203249. The next prime is 513231203357. The reversal of 513231203252 is 252302132315.

It can be written as a sum of positive squares in 2 ways, for example, as 361821498256 + 151409704996 = 601516^2 + 389114^2 .

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, 4559453 + ... + 4670660.

It is an arithmetic number, because the mean of its divisors is an integer number (74851609483).

Almost surely, 2^513231203252 is an apocalyptic number.

It is an amenable number.

513231203252 is a deficient number, since it is larger than the sum of its proper divisors (384988110544).

513231203252 is a wasteful number, since it uses less digits than its factorization.

513231203252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9244018 (or 9244016 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 513231203252 its reverse (252302132315), we get a palindrome (765533335567).

The spelling of 513231203252 in words is "five hundred thirteen billion, two hundred thirty-one million, two hundred three thousand, two hundred fifty-two".