505500055 has 4 divisors (see below), whose sum is σ = 606600072. Its totient is φ = 404400040.

The previous prime is 505500041. The next prime is 505500067. The reversal of 505500055 is 550005505.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 505500055 - 2⁷ = 505499927 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, 50550001 + ... + 50550010.

It is an arithmetic number, because the mean of its divisors is an integer number (151650018).

Almost surely, 2^505500055 is an apocalyptic number.

505500055 is a deficient number, since it is larger than the sum of its proper divisors (101100017).

505500055 is a wasteful number, since it uses less digits than its factorization.

505500055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101100016.

The product of its (nonzero) digits is 3125, while the sum is 25.

The square root of 505500055 is about 22483.3283790457. The cubic root of 505500055 is about 796.6001840107.

The spelling of 505500055 in words is "five hundred five million, five hundred thousand, fifty-five".