513121326402 has 16 divisors (see below), whose sum is σ = 1026368223840. Its totient is φ = 171019513632.

The previous prime is 513121326391. The next prime is 513121326407. The reversal of 513121326402 is 204623121315.

It is a self number, because there is not a number n which added to its sum of digits gives 513121326402.

It is not an unprimeable number, because it can be changed into a prime (513121326407) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5178963 + ... + 5277110.

It is an arithmetic number, because the mean of its divisors is an integer number (64148013990).

Almost surely, 2^513121326402 is an apocalyptic number.

513121326402 is an abundant number, since it is smaller than the sum of its proper divisors (513246897438).

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

513121326402 is a wasteful number, since it uses less digits than its factorization.

513121326402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10464257.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 513121326402 its reverse (204623121315), we get a palindrome (717744447717).

The spelling of 513121326402 in words is "five hundred thirteen billion, one hundred twenty-one million, three hundred twenty-six thousand, four hundred two".