165506313 has 8 divisors (see below), whose sum is σ = 252200128. Its totient is φ = 94575024.

The previous prime is 165506293. The next prime is 165506323. The reversal of 165506313 is 313605561.

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

It is not a de Polignac number, because 165506313 - 2⁶ = 165506249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165506323) 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, 3940606 + ... + 3940647.

It is an arithmetic number, because the mean of its divisors is an integer number (31525016).

Almost surely, 2^165506313 is an apocalyptic number.

It is an amenable number.

165506313 is a deficient number, since it is larger than the sum of its proper divisors (86693815).

165506313 is an equidigital number, since it uses as much as digits as its factorization.

165506313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7881263.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 165506313 is about 12864.9256896416. The cubic root of 165506313 is about 549.0410983131.

The spelling of 165506313 in words is "one hundred sixty-five million, five hundred six thousand, three hundred thirteen".