165038081 has 8 divisors (see below), whose sum is σ = 178578624. Its totient is φ = 151618320.

The previous prime is 165038051. The next prime is 165038119. The reversal of 165038081 is 180830561.

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

It is a cyclic number.

It is not a de Polignac number, because 165038081 - 2²² = 160843777 is a prime.

It is a super-2 number, since 2×165038081² = 54475136360325122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165038011) 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, 27341 + ... + 32826.

It is an arithmetic number, because the mean of its divisors is an integer number (22322328).

Almost surely, 2^165038081 is an apocalyptic number.

It is an amenable number.

165038081 is a deficient number, since it is larger than the sum of its proper divisors (13540543).

165038081 is a wasteful number, since it uses less digits than its factorization.

165038081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60391.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 165038081 is about 12846.7147940631. The cubic root of 165038081 is about 548.5228473346.

The spelling of 165038081 in words is "one hundred sixty-five million, thirty-eight thousand, eighty-one".