165120513 has 8 divisors (see below), whose sum is σ = 220262400. Its totient is φ = 110029488.

The previous prime is 165120509. The next prime is 165120517. The reversal of 165120513 is 315021561.

It is an interprime number because it is at equal distance from previous prime (165120509) and next prime (165120517).

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

It is not a de Polignac number, because 165120513 - 2² = 165120509 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165120517) 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, 4353 + ... + 18686.

It is an arithmetic number, because the mean of its divisors is an integer number (27532800).

Almost surely, 2^165120513 is an apocalyptic number.

It is an amenable number.

165120513 is a deficient number, since it is larger than the sum of its proper divisors (55141887).

165120513 is a wasteful number, since it uses less digits than its factorization.

165120513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25431.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 165120513 is about 12849.9226845923. The cubic root of 165120513 is about 548.6141561791.

The spelling of 165120513 in words is "one hundred sixty-five million, one hundred twenty thousand, five hundred thirteen".