165115575 has 18 divisors (see below), whose sum is σ = 295740744. Its totient is φ = 88061520.

The previous prime is 165115547. The next prime is 165115583. The reversal of 165115575 is 575511561.

It is a happy number.

It is not a de Polignac number, because 165115575 - 2¹⁴ = 165099191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 366699 + ... + 367148.

Almost surely, 2^165115575 is an apocalyptic number.

165115575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165115575 is a deficient number, since it is larger than the sum of its proper divisors (130625169).

165115575 is a wasteful number, since it uses less digits than its factorization.

165115575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733863 (or 733855 counting only the distinct ones).

The product of its digits is 26250, while the sum is 36.

The square root of 165115575 is about 12849.7305419219. The cubic root of 165115575 is about 548.6086872771.

The spelling of 165115575 in words is "one hundred sixty-five million, one hundred fifteen thousand, five hundred seventy-five".