505255550 has 24 divisors (see below), whose sum is σ = 940828176. Its totient is φ = 201875840.

The previous prime is 505255537. The next prime is 505255561. The reversal of 505255550 is 55552505.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43679 + ... + 54021.

It is an arithmetic number, because the mean of its divisors is an integer number (39201174).

Almost surely, 2^505255550 is an apocalyptic number.

505255550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505255550 is a deficient number, since it is larger than the sum of its proper divisors (435572626).

505255550 is a wasteful number, since it uses less digits than its factorization.

505255550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11332 (or 11327 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 32.

The square root of 505255550 is about 22477.8902479748. The cubic root of 505255550 is about 796.4717276188.

The spelling of 505255550 in words is "five hundred five million, two hundred fifty-five thousand, five hundred fifty".