165445313 has 8 divisors (see below), whose sum is σ = 181908480. Its totient is φ = 149219280.

The previous prime is 165445307. The next prime is 165445327. The reversal of 165445313 is 313544561.

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

It is a cyclic number.

It is not a de Polignac number, because 165445313 - 2¹² = 165441217 is a prime.

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 165445313.

It is not an unprimeable number, because it can be changed into a prime (165445303) 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, 57818 + ... + 60611.

It is an arithmetic number, because the mean of its divisors is an integer number (22738560).

Almost surely, 2^165445313 is an apocalyptic number.

It is an amenable number.

165445313 is a deficient number, since it is larger than the sum of its proper divisors (16463167).

165445313 is a wasteful number, since it uses less digits than its factorization.

165445313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118567.

The product of its digits is 21600, while the sum is 32.

The square root of 165445313 is about 12862.5546840431. The cubic root of 165445313 is about 548.9736373971.

Adding to 165445313 its reverse (313544561), we get a palindrome (478989874).

The spelling of 165445313 in words is "one hundred sixty-five million, four hundred forty-five thousand, three hundred thirteen".