52507137513 has 4 divisors (see below), whose sum is σ = 70009516688. Its totient is φ = 35004758340.

The previous prime is 52507137509. The next prime is 52507137539. The reversal of 52507137513 is 31573170525.

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 not a de Polignac number, because 52507137513 - 2² = 52507137509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52507137563) 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, 8751189583 + ... + 8751189588.

It is an arithmetic number, because the mean of its divisors is an integer number (17502379172).

Almost surely, 2^52507137513 is an apocalyptic number.

It is an amenable number.

52507137513 is a deficient number, since it is larger than the sum of its proper divisors (17502379175).

52507137513 is a wasteful number, since it uses less digits than its factorization.

52507137513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17502379174.

The product of its (nonzero) digits is 110250, while the sum is 39.

The spelling of 52507137513 in words is "fifty-two billion, five hundred seven million, one hundred thirty-seven thousand, five hundred thirteen".