52815487 has 4 divisors (see below), whose sum is σ = 52867360. Its totient is φ = 52763616.

The previous prime is 52815479. The next prime is 52815491. The reversal of 52815487 is 78451825.

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 52815487 - 2³ = 52815479 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 (52815407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24378 + ... + 26455.

It is an arithmetic number, because the mean of its divisors is an integer number (13216840).

Almost surely, 2^52815487 is an apocalyptic number.

52815487 is a deficient number, since it is larger than the sum of its proper divisors (51873).

52815487 is a wasteful number, since it uses less digits than its factorization.

52815487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51872.

The product of its digits is 89600, while the sum is 40.

The square root of 52815487 is about 7267.4264358162. The cubic root of 52815487 is about 375.1921669896.

The spelling of 52815487 in words is "fifty-two million, eight hundred fifteen thousand, four hundred eighty-seven".