165355513 has 4 divisors (see below), whose sum is σ = 166370128. Its totient is φ = 164340900.

The previous prime is 165355469. The next prime is 165355517. The reversal of 165355513 is 315553561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165355513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165355517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507063 + ... + 507388.

It is an arithmetic number, because the mean of its divisors is an integer number (41592532).

Almost surely, 2^165355513 is an apocalyptic number.

It is an amenable number.

165355513 is a deficient number, since it is larger than the sum of its proper divisors (1014615).

165355513 is a wasteful number, since it uses less digits than its factorization.

165355513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014614.

The product of its digits is 33750, while the sum is 34.

The square root of 165355513 is about 12859.0634573440. The cubic root of 165355513 is about 548.8742959013.

The spelling of 165355513 in words is "one hundred sixty-five million, three hundred fifty-five thousand, five hundred thirteen".