165005513 has 4 divisors (see below), whose sum is σ = 165158400. Its totient is φ = 164852628.

The previous prime is 165005509. The next prime is 165005527. The reversal of 165005513 is 315500561.

165005513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 315500561 = 1237 ⋅255053.

It is a cyclic number.

It is not a de Polignac number, because 165005513 - 2² = 165005509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165004513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74813 + ... + 76986.

It is an arithmetic number, because the mean of its divisors is an integer number (41289600).

Almost surely, 2^165005513 is an apocalyptic number.

It is an amenable number.

165005513 is a deficient number, since it is larger than the sum of its proper divisors (152887).

165005513 is a wasteful number, since it uses less digits than its factorization.

165005513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152886.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 165005513 is about 12845.4471701066. The cubic root of 165005513 is about 548.4867638093.

The spelling of 165005513 in words is "one hundred sixty-five million, five thousand, five hundred thirteen".