505520055 has 32 divisors (see below), whose sum is σ = 899985600. Its totient is φ = 269225856.

The previous prime is 505520051. The next prime is 505520063. The reversal of 505520055 is 550025505.

It is a happy number.

505520055 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 505520055 - 2² = 505520051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505520051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109657 + ... + 114173.

It is an arithmetic number, because the mean of its divisors is an integer number (28124550).

Almost surely, 2^505520055 is an apocalyptic number.

505520055 is a deficient number, since it is larger than the sum of its proper divisors (394465545).

505520055 is a wasteful number, since it uses less digits than its factorization.

505520055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360 (or 5354 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 27.

The square root of 505520055 is about 22483.7731486510. The cubic root of 505520055 is about 796.6106896433.

The spelling of 505520055 in words is "five hundred five million, five hundred twenty thousand, fifty-five".