513521231513543 has 16 divisors (see below), whose sum is σ = 565172585782272. Its totient is φ = 462697958352000.

The previous prime is 513521231513533. The next prime is 513521231513567. The reversal of 513521231513543 is 345315132125315.

It is a cyclic number.

It is not a de Polignac number, because 513521231513543 - 2¹⁶ = 513521231448007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513521231513494 and 513521231513503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513521231513533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66875498 + ... + 74157768.

It is an arithmetic number, because the mean of its divisors is an integer number (35323286611392).

Almost surely, 2^{513521231513543} is an apocalyptic number.

513521231513543 is a deficient number, since it is larger than the sum of its proper divisors (51651354268729).

513521231513543 is a wasteful number, since it uses less digits than its factorization.

513521231513543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7339126.

The product of its digits is 810000, while the sum is 44.

Adding to 513521231513543 its reverse (345315132125315), we get a palindrome (858836363638858).

The spelling of 513521231513543 in words is "five hundred thirteen trillion, five hundred twenty-one billion, two hundred thirty-one million, five hundred thirteen thousand, five hundred forty-three".