505005155 has 16 divisors (see below), whose sum is σ = 612254784. Its totient is φ = 399859200.

The previous prime is 505005143. The next prime is 505005173. The reversal of 505005155 is 551500505.

It is not a de Polignac number, because 505005155 - 2⁶ = 505005091 is a prime.

It is a Duffinian 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, 235247 + ... + 237383.

It is an arithmetic number, because the mean of its divisors is an integer number (38265924).

Almost surely, 2^505005155 is an apocalyptic number.

505005155 is a deficient number, since it is larger than the sum of its proper divisors (107249629).

505005155 is a wasteful number, since it uses less digits than its factorization.

505005155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606.

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 505005155 is about 22472.3197511961. The cubic root of 505005155 is about 796.3401338195.

It can be divided in two parts, 50500 and 5155, that added together give a palindrome (55655).

The spelling of 505005155 in words is "five hundred five million, five thousand, one hundred fifty-five".