515505155 has 16 divisors (see below), whose sum is σ = 675571968. Its totient is φ = 374508000.

The previous prime is 515505139. The next prime is 515505157. The reversal of 515505155 is 551505515.

It is not a de Polignac number, because 515505155 - 2⁴ = 515505139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (515505157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52160 + ... + 61250.

It is an arithmetic number, because the mean of its divisors is an integer number (42223248).

Almost surely, 2^515505155 is an apocalyptic number.

515505155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

515505155 is a deficient number, since it is larger than the sum of its proper divisors (160066813).

515505155 is a wasteful number, since it uses less digits than its factorization.

515505155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10138.

The product of its (nonzero) digits is 15625, while the sum is 32.

The square root of 515505155 is about 22704.7386023270. The cubic root of 515505155 is about 801.8214513090.

The spelling of 515505155 in words is "five hundred fifteen million, five hundred five thousand, one hundred fifty-five".