215215165 has 16 divisors (see below), whose sum is σ = 282038400. Its totient is φ = 156352320.

The previous prime is 215215157. The next prime is 215215193. The reversal of 215215165 is 561512512.

It is not a de Polignac number, because 215215165 - 2³ = 215215157 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 75547 + ... + 78343.

It is an arithmetic number, because the mean of its divisors is an integer number (17627400).

Almost surely, 2^215215165 is an apocalyptic number.

It is an amenable number.

215215165 is a deficient number, since it is larger than the sum of its proper divisors (66823235).

215215165 is a wasteful number, since it uses less digits than its factorization.

215215165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4212.

The product of its digits is 3000, while the sum is 28.

The square root of 215215165 is about 14670.2135294617. The cubic root of 215215165 is about 599.2724189924.

Adding to 215215165 its reverse (561512512), we get a palindrome (776727677).

The spelling of 215215165 in words is "two hundred fifteen million, two hundred fifteen thousand, one hundred sixty-five".