215501315 has 16 divisors (see below), whose sum is σ = 261424800. Its totient is φ = 170530560.

The previous prime is 215501269. The next prime is 215501323. The reversal of 215501315 is 513105512.

It is a happy number.

It is not a de Polignac number, because 215501315 - 2¹⁰ = 215500291 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204911 + ... + 205959.

It is an arithmetic number, because the mean of its divisors is an integer number (16339050).

Almost surely, 2^215501315 is an apocalyptic number.

215501315 is a deficient number, since it is larger than the sum of its proper divisors (45923485).

215501315 is a wasteful number, since it uses less digits than its factorization.

215501315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 215501315 is about 14679.9630449126. The cubic root of 215501315 is about 599.5378988252.

Adding to 215501315 its reverse (513105512), we get a palindrome (728606827).

The spelling of 215501315 in words is "two hundred fifteen million, five hundred one thousand, three hundred fifteen".