165112513 has 4 divisors (see below), whose sum is σ = 165183408. Its totient is φ = 165041620.

The previous prime is 165112511. The next prime is 165112523. The reversal of 165112513 is 315211561.

It is a happy number.

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 not a de Polignac number, because 165112513 - 2¹ = 165112511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165112511) 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, 31831 + ... + 36652.

It is an arithmetic number, because the mean of its divisors is an integer number (41295852).

Almost surely, 2^165112513 is an apocalyptic number.

It is an amenable number.

165112513 is a deficient number, since it is larger than the sum of its proper divisors (70895).

165112513 is an equidigital number, since it uses as much as digits as its factorization.

165112513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70894.

The product of its digits is 900, while the sum is 25.

The square root of 165112513 is about 12849.6113949022. The cubic root of 165112513 is about 548.6052960157.

The spelling of 165112513 in words is "one hundred sixty-five million, one hundred twelve thousand, five hundred thirteen".