513231232113520 has 40 divisors (see below), whose sum is σ = 1245143597914656. Its totient is φ = 196366732286208.

The previous prime is 513231232113491. The next prime is 513231232113557. The reversal of 513231232113520 is 25311232132315.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139465006887 + ... + 139465010566.

Almost surely, 2^{513231232113520} is an apocalyptic number.

It is an amenable number.

513231232113520 is an abundant number, since it is smaller than the sum of its proper divisors (731912365801136).

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

513231232113520 is a wasteful number, since it uses less digits than its factorization.

513231232113520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278930017489 (or 278930017483 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 513231232113520 its reverse (25311232132315), we get a palindrome (538542464245835).

The spelling of 513231232113520 in words is "five hundred thirteen trillion, two hundred thirty-one billion, two hundred thirty-two million, one hundred thirteen thousand, five hundred twenty".