165413345 has 4 divisors (see below), whose sum is σ = 198496020. Its totient is φ = 132330672.

The previous prime is 165413323. The next prime is 165413357. The reversal of 165413345 is 543314561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543314561 = 5281 ⋅102881.

It can be written as a sum of positive squares in 2 ways, for example, as 24373969 + 141039376 = 4937^2 + 11876^2 .

It is a cyclic number.

It is not a de Polignac number, because 165413345 - 2⁸ = 165413089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16541330 + ... + 16541339.

It is an arithmetic number, because the mean of its divisors is an integer number (49624005).

Almost surely, 2^165413345 is an apocalyptic number.

It is an amenable number.

165413345 is a deficient number, since it is larger than the sum of its proper divisors (33082675).

165413345 is an equidigital number, since it uses as much as digits as its factorization.

165413345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33082674.

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

The square root of 165413345 is about 12861.3119470760. The cubic root of 165413345 is about 548.9382768312.

The spelling of 165413345 in words is "one hundred sixty-five million, four hundred thirteen thousand, three hundred forty-five".