505000055 has 16 divisors (see below), whose sum is σ = 716454720. Its totient is φ = 334344192.

The previous prime is 505000043. The next prime is 505000073. The reversal of 505000055 is 550000505.

It is a happy number.

It is not a de Polignac number, because 505000055 - 2²⁶ = 437891191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247754 + ... + 249783.

It is an arithmetic number, because the mean of its divisors is an integer number (44778420).

Almost surely, 2^505000055 is an apocalyptic number.

505000055 is a deficient number, since it is larger than the sum of its proper divisors (211454665).

505000055 is a wasteful number, since it uses less digits than its factorization.

505000055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497578.

The product of its (nonzero) digits is 625, while the sum is 20.

The square root of 505000055 is about 22472.2062779781. The cubic root of 505000055 is about 796.3374530889.

The spelling of 505000055 in words is "five hundred five million, fifty-five", and thus it is an aban number.