855512515 has 16 divisors (see below), whose sum is σ = 1206094176. Its totient is φ = 574329600.

The previous prime is 855512501. The next prime is 855512527. The reversal of 855512515 is 515215558.

It is not a de Polignac number, because 855512515 - 2²⁷ = 721294787 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 597546 + ... + 598975.

It is an arithmetic number, because the mean of its divisors is an integer number (75380886).

Almost surely, 2^855512515 is an apocalyptic number.

855512515 is a deficient number, since it is larger than the sum of its proper divisors (350581661).

855512515 is a wasteful number, since it uses less digits than its factorization.

855512515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196550.

The product of its digits is 50000, while the sum is 37.

The square root of 855512515 is about 29249.1455430753. The cubic root of 855512515 is about 949.3116028580.

The spelling of 855512515 in words is "eight hundred fifty-five million, five hundred twelve thousand, five hundred fifteen".