165515215 has 8 divisors (see below), whose sum is σ = 198715968. Its totient is φ = 132347040.

The previous prime is 165515167. The next prime is 165515239. The reversal of 165515215 is 512515561.

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

It is not a de Polignac number, because 165515215 - 2¹¹ = 165513167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4954 + ... + 18856.

It is an arithmetic number, because the mean of its divisors is an integer number (24839496).

Almost surely, 2^165515215 is an apocalyptic number.

165515215 is a deficient number, since it is larger than the sum of its proper divisors (33200753).

165515215 is a wasteful number, since it uses less digits than its factorization.

165515215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16289.

The product of its digits is 7500, while the sum is 31.

The square root of 165515215 is about 12865.2716644461. The cubic root of 165515215 is about 549.0509417971.

The spelling of 165515215 in words is "one hundred sixty-five million, five hundred fifteen thousand, two hundred fifteen".