52516639 has 4 divisors (see below), whose sum is σ = 60019024. Its totient is φ = 45014256.

The previous prime is 52516591. The next prime is 52516643. The reversal of 52516639 is 93661525.

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

It is a de Polignac number, because none of the positive numbers 2^k-52516639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52516598 and 52516607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52516649) 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, 3751182 + ... + 3751195.

It is an arithmetic number, because the mean of its divisors is an integer number (15004756).

Almost surely, 2^52516639 is an apocalyptic number.

52516639 is a deficient number, since it is larger than the sum of its proper divisors (7502385).

52516639 is an equidigital number, since it uses as much as digits as its factorization.

52516639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7502384.

The product of its digits is 48600, while the sum is 37.

The square root of 52516639 is about 7246.8364822176. The cubic root of 52516639 is about 374.4831730707.

The spelling of 52516639 in words is "fifty-two million, five hundred sixteen thousand, six hundred thirty-nine".