52518647 has 4 divisors (see below), whose sum is σ = 53183520. Its totient is φ = 51853776.

The previous prime is 52518617. The next prime is 52518649. The reversal of 52518647 is 74681525.

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 52518647 - 2¹⁰ = 52517623 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 52518647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52518649) 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, 332318 + ... + 332475.

It is an arithmetic number, because the mean of its divisors is an integer number (13295880).

Almost surely, 2^52518647 is an apocalyptic number.

52518647 is a deficient number, since it is larger than the sum of its proper divisors (664873).

52518647 is an equidigital number, since it uses as much as digits as its factorization.

52518647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664872.

The product of its digits is 67200, while the sum is 38.

The square root of 52518647 is about 7246.9750241049. The cubic root of 52518647 is about 374.4879458605.

The spelling of 52518647 in words is "fifty-two million, five hundred eighteen thousand, six hundred forty-seven".