215500005 has 24 divisors (see below), whose sum is σ = 426895872. Its totient is φ = 98514144.

The previous prime is 215500001. The next prime is 215500039. The reversal of 215500005 is 500005512.

It is not a de Polignac number, because 215500005 - 2² = 215500001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215500001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 341749 + ... + 342378.

It is an arithmetic number, because the mean of its divisors is an integer number (17787328).

Almost surely, 2^215500005 is an apocalyptic number.

It is an amenable number.

215500005 is a deficient number, since it is larger than the sum of its proper divisors (211395867).

215500005 is a wasteful number, since it uses less digits than its factorization.

215500005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684145 (or 684142 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 215500005 is about 14679.9184262039. The cubic root of 215500005 is about 599.5366839892.

Adding to 215500005 its reverse (500005512), we get a palindrome (715505517).

The spelling of 215500005 in words is "two hundred fifteen million, five hundred thousand, five".