52985281 has 4 divisors (see below), whose sum is σ = 55774000. Its totient is φ = 50196564.

The previous prime is 52985263. The next prime is 52985287. The reversal of 52985281 is 18258925.

52985281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 52985281 - 2⁵ = 52985249 is a prime.

It is a super-2 number, since 2×52985281² = 5614880005297922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52985287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394331 + ... + 1394368.

It is an arithmetic number, because the mean of its divisors is an integer number (13943500).

Almost surely, 2^52985281 is an apocalyptic number.

It is an amenable number.

52985281 is a deficient number, since it is larger than the sum of its proper divisors (2788719).

52985281 is a wasteful number, since it uses less digits than its factorization.

52985281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788718.

The product of its digits is 57600, while the sum is 40.

The square root of 52985281 is about 7279.0989140140. The cubic root of 52985281 is about 375.5937993913.

The spelling of 52985281 in words is "fifty-two million, nine hundred eighty-five thousand, two hundred eighty-one".