165500015 has 32 divisors (see below), whose sum is σ = 217753920. Its totient is φ = 120268800.

The previous prime is 165500011. The next prime is 165500017. The reversal of 165500015 is 510005561.

It is not a de Polignac number, because 165500015 - 2² = 165500011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165500011) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 305645 + ... + 306185.

It is an arithmetic number, because the mean of its divisors is an integer number (6804810).

Almost surely, 2^165500015 is an apocalyptic number.

165500015 is a deficient number, since it is larger than the sum of its proper divisors (52253905).

165500015 is a wasteful number, since it uses less digits than its factorization.

165500015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 165500015 is about 12864.6809132601. The cubic root of 165500015 is about 549.0341340175.

Adding to 165500015 its reverse (510005561), we get a palindrome (675505576).

The spelling of 165500015 in words is "one hundred sixty-five million, five hundred thousand, fifteen".