515040538013 has 4 divisors (see below), whose sum is σ = 515062600860. Its totient is φ = 515018475168.

The previous prime is 515040538007. The next prime is 515040538031. The reversal of 515040538013 is 310835040515.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37584413689 + 477456124324 = 193867^2 + 690982^2 .

It is a cyclic number.

It is not a de Polignac number, because 515040538013 - 2⁴ = 515040537997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515040535013) 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, 10996370 + ... + 11043107.

It is an arithmetic number, because the mean of its divisors is an integer number (128765650215).

Almost surely, 2^515040538013 is an apocalyptic number.

It is an amenable number.

515040538013 is a deficient number, since it is larger than the sum of its proper divisors (22062847).

515040538013 is a wasteful number, since it uses less digits than its factorization.

515040538013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22062846.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 515040538013 its reverse (310835040515), we get a palindrome (825875578528).

The spelling of 515040538013 in words is "five hundred fifteen billion, forty million, five hundred thirty-eight thousand, thirteen".