215012516605 has 16 divisors (see below), whose sum is σ = 258500563200. Its totient is φ = 171686507328.

The previous prime is 215012516603. The next prime is 215012516611. The reversal of 215012516605 is 506615210512.

It is a cyclic number.

It is not a de Polignac number, because 215012516605 - 2¹ = 215012516603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215012516603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10905046 + ... + 10924744.

It is an arithmetic number, because the mean of its divisors is an integer number (16156285200).

Almost surely, 2^215012516605 is an apocalyptic number.

It is an amenable number.

215012516605 is a deficient number, since it is larger than the sum of its proper divisors (43488046595).

215012516605 is a wasteful number, since it uses less digits than its factorization.

215012516605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23700.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 215012516605 in words is "two hundred fifteen billion, twelve million, five hundred sixteen thousand, six hundred five".