165242915 has 16 divisors (see below), whose sum is σ = 206006976. Its totient is φ = 127142400.

The previous prime is 165242887. The next prime is 165242947. The reversal of 165242915 is 519242561.

165242915 = 180² + 181² + ... + 794².

It is a happy number.

It is not a de Polignac number, because 165242915 - 2¹² = 165238819 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8879 + ... + 20231.

It is an arithmetic number, because the mean of its divisors is an integer number (12875436).

Almost surely, 2^165242915 is an apocalyptic number.

165242915 is a deficient number, since it is larger than the sum of its proper divisors (40764061).

165242915 is a wasteful number, since it uses less digits than its factorization.

165242915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11470.

The product of its digits is 21600, while the sum is 35.

The square root of 165242915 is about 12854.6845546672. The cubic root of 165242915 is about 548.7496832206.

The spelling of 165242915 in words is "one hundred sixty-five million, two hundred forty-two thousand, nine hundred fifteen".