165522009 has 8 divisors (see below), whose sum is σ = 220939840. Its totient is φ = 110226096.

The previous prime is 165522001. The next prime is 165522017. The reversal of 165522009 is 900225561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (165522001) and next prime (165522017).

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

It is not a de Polignac number, because 165522009 - 2³ = 165522001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165522001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27262 + ... + 32775.

It is an arithmetic number, because the mean of its divisors is an integer number (27617480).

Almost surely, 2^165522009 is an apocalyptic number.

It is an amenable number.

165522009 is a deficient number, since it is larger than the sum of its proper divisors (55417831).

165522009 is an equidigital number, since it uses as much as digits as its factorization.

165522009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60959.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 165522009 is about 12865.5357059082. The cubic root of 165522009 is about 549.0584540996.

The spelling of 165522009 in words is "one hundred sixty-five million, five hundred twenty-two thousand, nine".