165105229 has 4 divisors (see below), whose sum is σ = 168220476. Its totient is φ = 161989984.

The previous prime is 165105209. The next prime is 165105233. The reversal of 165105229 is 922501561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 922501561 = 967 ⋅953983.

It can be written as a sum of positive squares in 2 ways, for example, as 78801129 + 86304100 = 8877^2 + 9290^2 .

It is a cyclic number.

It is not a de Polignac number, because 165105229 - 2⁵ = 165105197 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165105229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165105209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1557544 + ... + 1557649.

It is an arithmetic number, because the mean of its divisors is an integer number (42055119).

Almost surely, 2^165105229 is an apocalyptic number.

It is an amenable number.

165105229 is a deficient number, since it is larger than the sum of its proper divisors (3115247).

165105229 is an equidigital number, since it uses as much as digits as its factorization.

165105229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115246.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 165105229 is about 12849.3279590802. The cubic root of 165105229 is about 548.5972285881.

The spelling of 165105229 in words is "one hundred sixty-five million, one hundred five thousand, two hundred twenty-nine".