513500413552243 has 4 divisors (see below), whose sum is σ = 553000445363968. Its totient is φ = 474000381740520.

The previous prime is 513500413552241. The next prime is 513500413552283. The reversal of 513500413552243 is 342255314005315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513500413552243 - 2¹ = 513500413552241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513500413552243.

It is not an unprimeable number, because it can be changed into a prime (513500413552241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19750015905843 + ... + 19750015905868.

It is an arithmetic number, because the mean of its divisors is an integer number (138250111340992).

Almost surely, 2^{513500413552243} is an apocalyptic number.

513500413552243 is a deficient number, since it is larger than the sum of its proper divisors (39500031811725).

513500413552243 is a wasteful number, since it uses less digits than its factorization.

513500413552243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39500031811724.

The product of its (nonzero) digits is 1080000, while the sum is 43.

Adding to 513500413552243 its reverse (342255314005315), we get a palindrome (855755727557558).

The spelling of 513500413552243 in words is "five hundred thirteen trillion, five hundred billion, four hundred thirteen million, five hundred fifty-two thousand, two hundred forty-three".