52805287 has 4 divisors (see below), whose sum is σ = 52828056. Its totient is φ = 52782520.

The previous prime is 52805279. The next prime is 52805303. The reversal of 52805287 is 78250825.

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 52805287 - 2³ = 52805279 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 (52805267) 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, 7453 + ... + 12694.

It is an arithmetic number, because the mean of its divisors is an integer number (13207014).

Almost surely, 2^52805287 is an apocalyptic number.

52805287 is a deficient number, since it is larger than the sum of its proper divisors (22769).

52805287 is a wasteful number, since it uses less digits than its factorization.

52805287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22768.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 52805287 is about 7266.7246404415. The cubic root of 52805287 is about 375.1680124173.

The spelling of 52805287 in words is "fifty-two million, eight hundred five thousand, two hundred eighty-seven".