165025013 has 12 divisors (see below), whose sum is σ = 178234848. Its totient is φ = 152689320.

The previous prime is 165025009. The next prime is 165025027. The reversal of 165025013 is 310520561.

It is not a de Polignac number, because 165025013 - 2² = 165025009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165025013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165025043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10208 + ... + 20838.

It is an arithmetic number, because the mean of its divisors is an integer number (14852904).

Almost surely, 2^165025013 is an apocalyptic number.

It is an amenable number.

165025013 is a deficient number, since it is larger than the sum of its proper divisors (13209835).

165025013 is a wasteful number, since it uses less digits than its factorization.

165025013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712 (or 10693 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 165025013 is about 12846.2061714734. The cubic root of 165025013 is about 548.5083692906.

Adding to 165025013 its reverse (310520561), we get a palindrome (475545574).

The spelling of 165025013 in words is "one hundred sixty-five million, twenty-five thousand, thirteen".