165216315 has 16 divisors (see below), whose sum is σ = 288377856. Its totient is φ = 80104800.

The previous prime is 165216287. The next prime is 165216349. The reversal of 165216315 is 513612561.

It is not a de Polignac number, because 165216315 - 2⁷ = 165216187 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500491 + ... + 500820.

It is an arithmetic number, because the mean of its divisors is an integer number (18023616).

Almost surely, 2^165216315 is an apocalyptic number.

165216315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165216315 is a deficient number, since it is larger than the sum of its proper divisors (123161541).

165216315 is a wasteful number, since it uses less digits than its factorization.

165216315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001330.

The product of its digits is 5400, while the sum is 30.

The square root of 165216315 is about 12853.6498707566. The cubic root of 165216315 is about 548.7202366230.

Adding to 165216315 its reverse (513612561), we get a palindrome (678828876).

The spelling of 165216315 in words is "one hundred sixty-five million, two hundred sixteen thousand, three hundred fifteen".