165217115 has 16 divisors (see below), whose sum is σ = 227543040. Its totient is φ = 112812000.

The previous prime is 165217057. The next prime is 165217121. The reversal of 165217115 is 511712561.

165217115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165217115 - 2¹⁰ = 165216091 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, 1511 + ... + 18240.

It is an arithmetic number, because the mean of its divisors is an integer number (14221440).

Almost surely, 2^165217115 is an apocalyptic number.

165217115 is a deficient number, since it is larger than the sum of its proper divisors (62325925).

165217115 is a wasteful number, since it uses less digits than its factorization.

165217115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20002.

The product of its digits is 2100, while the sum is 29.

The square root of 165217115 is about 12853.6809902845. The cubic root of 165217115 is about 548.7211222811.

Adding to 165217115 its reverse (511712561), we get a palindrome (676929676).

The spelling of 165217115 in words is "one hundred sixty-five million, two hundred seventeen thousand, one hundred fifteen".