52215685 has 4 divisors (see below), whose sum is σ = 62658828. Its totient is φ = 41772544.

The previous prime is 52215671. The next prime is 52215707. The reversal of 52215685 is 58651225.

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 21734244 + 30481441 = 4662^2 + 5521^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52215685 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52215685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5221564 + ... + 5221573.

It is an arithmetic number, because the mean of its divisors is an integer number (15664707).

Almost surely, 2^52215685 is an apocalyptic number.

It is an amenable number.

52215685 is a deficient number, since it is larger than the sum of its proper divisors (10443143).

52215685 is a wasteful number, since it uses less digits than its factorization.

52215685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10443142.

The product of its digits is 24000, while the sum is 34.

The square root of 52215685 is about 7226.0421393734. The cubic root of 52215685 is about 373.7664593819.

It can be divided in two parts, 52215 and 685, that added together give a square (52900 = 230²).

The spelling of 52215685 in words is "fifty-two million, two hundred fifteen thousand, six hundred eighty-five".