165510055 has 4 divisors (see below), whose sum is σ = 198612072. Its totient is φ = 132408040.

The previous prime is 165510049. The next prime is 165510089. The reversal of 165510055 is 550015561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550015561 = 19429 ⋅28309.

It is a de Polignac number, because none of the positive numbers 2^k-165510055 is a prime.

It is a super-2 number, since 2×165510055² = 54787156612206050, which contains 22 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 16551001 + ... + 16551010.

It is an arithmetic number, because the mean of its divisors is an integer number (49653018).

Almost surely, 2^165510055 is an apocalyptic number.

165510055 is a deficient number, since it is larger than the sum of its proper divisors (33102017).

165510055 is an equidigital number, since it uses as much as digits as its factorization.

165510055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33102016.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 165510055 is about 12865.0711230059. The cubic root of 165510055 is about 549.0452361136.

The spelling of 165510055 in words is "one hundred sixty-five million, five hundred ten thousand, fifty-five".