215155555555 has 32 divisors (see below), whose sum is σ = 272924317440. Its totient is φ = 162641157120.

The previous prime is 215155555541. The next prime is 215155555561. The reversal of 215155555555 is 555555551512.

It is not a de Polignac number, because 215155555555 - 2²³ = 215147166947 is a prime.

215155555555 is a modest number, since divided by 555555 gives 215155 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 215155555499 and 215155555508.

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 31 ways as a sum of consecutive naturals, for example, 770847 + ... + 1012183.

It is an arithmetic number, because the mean of its divisors is an integer number (8528884920).

Almost surely, 2^215155555555 is an apocalyptic number.

215155555555 is a deficient number, since it is larger than the sum of its proper divisors (57768761885).

215155555555 is a wasteful number, since it uses less digits than its factorization.

215155555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241519.

The product of its digits is 3906250, while the sum is 49.

The spelling of 215155555555 in words is "two hundred fifteen billion, one hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-five".