505185550 has 24 divisors (see below), whose sum is σ = 952523856. Its totient is φ = 199304640.

The previous prime is 505185523. The next prime is 505185581. The reversal of 505185550 is 55581505.

It is a happy 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 11 ways as a sum of consecutive naturals, for example, 65554 + ... + 72853.

It is an arithmetic number, because the mean of its divisors is an integer number (39688494).

Almost surely, 2^505185550 is an apocalyptic number.

505185550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505185550 is a deficient number, since it is larger than the sum of its proper divisors (447338306).

505185550 is a wasteful number, since it uses less digits than its factorization.

505185550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138492 (or 138487 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 34.

The square root of 505185550 is about 22476.3331084054. Note that the first 3 decimals coincide. The cubic root of 505185550 is about 796.4349438593.

It can be divided in two parts, 5051 and 85550, that added together give a square (90601 = 301²).

The spelling of 505185550 in words is "five hundred five million, one hundred eighty-five thousand, five hundred fifty".