52780085 has 4 divisors (see below), whose sum is σ = 63336108. Its totient is φ = 42224064.

The previous prime is 52780069. The next prime is 52780099. The reversal of 52780085 is 58008725.

52780085 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.

It can be written as a sum of positive squares in 2 ways, for example, as 42172036 + 10608049 = 6494^2 + 3257^2 .

It is a cyclic number.

It is not a de Polignac number, because 52780085 - 2⁴ = 52780069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 5278004 + ... + 5278013.

It is an arithmetic number, because the mean of its divisors is an integer number (15834027).

Almost surely, 2^52780085 is an apocalyptic number.

It is an amenable number.

52780085 is a deficient number, since it is larger than the sum of its proper divisors (10556023).

52780085 is a wasteful number, since it uses less digits than its factorization.

52780085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556022.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 52780085 is about 7264.9903647562. The cubic root of 52780085 is about 375.1083183390.

The spelling of 52780085 in words is "fifty-two million, seven hundred eighty thousand, eighty-five".