505705285 has 4 divisors (see below), whose sum is σ = 606846348. Its totient is φ = 404564224.

The previous prime is 505705279. The next prime is 505705337. The reversal of 505705285 is 582507505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582507505 = 5 ⋅116501501.

It can be written as a sum of positive squares in 2 ways, for example, as 211033729 + 294671556 = 14527^2 + 17166^2 .

It is a cyclic number.

It is not a de Polignac number, because 505705285 - 2¹⁹ = 505180997 is a prime.

It is a Duffinian number.

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, 50570524 + ... + 50570533.

It is an arithmetic number, because the mean of its divisors is an integer number (151711587).

Almost surely, 2^505705285 is an apocalyptic number.

It is an amenable number.

505705285 is a deficient number, since it is larger than the sum of its proper divisors (101141063).

505705285 is a wasteful number, since it uses less digits than its factorization.

505705285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101141062.

The product of its (nonzero) digits is 70000, while the sum is 37.

The square root of 505705285 is about 22487.8919643438. The cubic root of 505705285 is about 796.7079743953.

It can be divided in two parts, 50570 and 5285, that added together give a palindrome (55855).

The spelling of 505705285 in words is "five hundred five million, seven hundred five thousand, two hundred eighty-five".