165523345 has 32 divisors (see below), whose sum is σ = 227566080. Its totient is φ = 114566400.

The previous prime is 165523333. The next prime is 165523361. The reversal of 165523345 is 543325561.

It is not a de Polignac number, because 165523345 - 2⁵ = 165523313 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 165523345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124072 + ... + 125398.

It is an arithmetic number, because the mean of its divisors is an integer number (7111440).

Almost surely, 2^165523345 is an apocalyptic number.

It is an amenable number.

165523345 is a deficient number, since it is larger than the sum of its proper divisors (62042735).

165523345 is a wasteful number, since it uses less digits than its factorization.

165523345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its digits is 54000, while the sum is 34.

The square root of 165523345 is about 12865.5876274658. The cubic root of 165523345 is about 549.0599313253.

The spelling of 165523345 in words is "one hundred sixty-five million, five hundred twenty-three thousand, three hundred forty-five".