215530560651505 has 96 divisors (see below), whose sum is σ = 287972528659200. Its totient is φ = 154732022016000.

The previous prime is 215530560651499. The next prime is 215530560651521. The reversal of 215530560651505 is 505156065035512.

It is not a de Polignac number, because 215530560651505 - 2⁴¹ = 213331537395953 is a prime.

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 95 ways as a sum of consecutive naturals, for example, 11637081645 + ... + 11637100165.

It is an arithmetic number, because the mean of its divisors is an integer number (2999713840200).

Almost surely, 2^{215530560651505} is an apocalyptic number.

It is an amenable number.

215530560651505 is a deficient number, since it is larger than the sum of its proper divisors (72441968007695).

215530560651505 is a wasteful number, since it uses less digits than its factorization.

215530560651505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19447 (or 19436 counting only the distinct ones).

The product of its (nonzero) digits is 3375000, while the sum is 49.

The spelling of 215530560651505 in words is "two hundred fifteen trillion, five hundred thirty billion, five hundred sixty million, six hundred fifty-one thousand, five hundred five".