165345155 has 8 divisors (see below), whose sum is σ = 201209184. Its totient is φ = 130412800.

The previous prime is 165345143. The next prime is 165345157. The reversal of 165345155 is 551543561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165345155 - 2¹⁰ = 165344131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165345157) 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 7 ways as a sum of consecutive naturals, for example, 232526 + ... + 233235.

It is an arithmetic number, because the mean of its divisors is an integer number (25151148).

Almost surely, 2^165345155 is an apocalyptic number.

165345155 is a deficient number, since it is larger than the sum of its proper divisors (35864029).

165345155 is an equidigital number, since it uses as much as digits as its factorization.

165345155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465837.

The product of its digits is 45000, while the sum is 35.

The square root of 165345155 is about 12858.6607000885. The cubic root of 165345155 is about 548.8628350222.

The spelling of 165345155 in words is "one hundred sixty-five million, three hundred forty-five thousand, one hundred fifty-five".