520342134513 has 4 divisors (see below), whose sum is σ = 693789512688. Its totient is φ = 346894756340.

The previous prime is 520342134509. The next prime is 520342134517. The reversal of 520342134513 is 315431243025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (520342134509) and next prime (520342134517).

It is a cyclic number.

It is not a de Polignac number, because 520342134513 - 2² = 520342134509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520342134517) 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, 86723689083 + ... + 86723689088.

It is an arithmetic number, because the mean of its divisors is an integer number (173447378172).

Almost surely, 2^520342134513 is an apocalyptic number.

It is an amenable number.

520342134513 is a deficient number, since it is larger than the sum of its proper divisors (173447378175).

520342134513 is a wasteful number, since it uses less digits than its factorization.

520342134513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173447378174.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 520342134513 its reverse (315431243025), we get a palindrome (835773377538).

The spelling of 520342134513 in words is "five hundred twenty billion, three hundred forty-two million, one hundred thirty-four thousand, five hundred thirteen".