165340015 has 4 divisors (see below), whose sum is σ = 198408024. Its totient is φ = 132272008.

The previous prime is 165340009. The next prime is 165340037. The reversal of 165340015 is 510043561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165340015 - 2⁵ = 165339983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16533997 + ... + 16534006.

It is an arithmetic number, because the mean of its divisors is an integer number (49602006).

Almost surely, 2^165340015 is an apocalyptic number.

165340015 is a deficient number, since it is larger than the sum of its proper divisors (33068009).

165340015 is an equidigital number, since it uses as much as digits as its factorization.

165340015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33068008.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 165340015 is about 12858.4608332413. The cubic root of 165340015 is about 548.8571475574.

Adding to 165340015 its reverse (510043561), we get a palindrome (675383576).

The spelling of 165340015 in words is "one hundred sixty-five million, three hundred forty thousand, fifteen".