505055385 has 16 divisors (see below), whose sum is σ = 897876480. Its totient is φ = 269362800.

The previous prime is 505055381. The next prime is 505055389. The reversal of 505055385 is 583550505.

505055385 is a `hidden beast` number, since 50 + 50 + 553 + 8 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (505055381) and next prime (505055389).

It is not a de Polignac number, because 505055385 - 2² = 505055381 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (505055381) 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 15 ways as a sum of consecutive naturals, for example, 1870441 + ... + 1870710.

It is an arithmetic number, because the mean of its divisors is an integer number (56117280).

Almost surely, 2^505055385 is an apocalyptic number.

It is an amenable number.

505055385 is a deficient number, since it is larger than the sum of its proper divisors (392821095).

505055385 is a wasteful number, since it uses less digits than its factorization.

505055385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3741165 (or 3741159 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The square root of 505055385 is about 22473.4373205347. The cubic root of 505055385 is about 796.3665354238.

The spelling of 505055385 in words is "five hundred five million, fifty-five thousand, three hundred eighty-five".