215165 has 8 divisors (see below), whose sum is σ = 269568. Its totient is φ = 164560.

The previous prime is 215161. The next prime is 215179. The reversal of 215165 is 561512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215165 - 2² = 215161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821 + ... + 1050.

It is an arithmetic number, because the mean of its divisors is an integer number (33696).

2²¹⁵¹⁶⁵ is an apocalyptic number.

It is an amenable number.

215165 is a deficient number, since it is larger than the sum of its proper divisors (54403).

215165 is a wasteful number, since it uses less digits than its factorization.

215165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899.

The product of its digits is 300, while the sum is 20.

The square root of 215165 is about 463.8588147271. The cubic root of 215165 is about 59.9225853443.

Adding to 215165 its reverse (561512), we get a palindrome (776677).

The spelling of 215165 in words is "two hundred fifteen thousand, one hundred sixty-five".