165210241 has 4 divisors (see below), whose sum is σ = 188811712. Its totient is φ = 141608772.

The previous prime is 165210223. The next prime is 165210259. The reversal of 165210241 is 142012561.

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 an interprime number because it is at equal distance from previous prime (165210223) and next prime (165210259).

It is a cyclic number.

It is not a de Polignac number, because 165210241 - 2⁵ = 165210209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165210211) 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, 11800725 + ... + 11800738.

It is an arithmetic number, because the mean of its divisors is an integer number (47202928).

Almost surely, 2^165210241 is an apocalyptic number.

It is an amenable number.

165210241 is a deficient number, since it is larger than the sum of its proper divisors (23601471).

165210241 is an equidigital number, since it uses as much as digits as its factorization.

165210241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23601470.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 165210241 is about 12853.4135932833. The cubic root of 165210241 is about 548.7135121710.

The spelling of 165210241 in words is "one hundred sixty-five million, two hundred ten thousand, two hundred forty-one".