165543361 has 8 divisors (see below), whose sum is σ = 166515264. Its totient is φ = 164574960.

The previous prime is 165543359. The next prime is 165543373. The reversal of 165543361 is 163345561.

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 165543361 - 2¹ = 165543359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165543311) 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, 213771 + ... + 214543.

It is an arithmetic number, because the mean of its divisors is an integer number (20814408).

Almost surely, 2^165543361 is an apocalyptic number.

It is an amenable number.

165543361 is a deficient number, since it is larger than the sum of its proper divisors (971903).

165543361 is an equidigital number, since it uses as much as digits as its factorization.

165543361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751.

The product of its digits is 32400, while the sum is 34.

The square root of 165543361 is about 12866.3654930209. The cubic root of 165543361 is about 549.0820622230.

The spelling of 165543361 in words is "one hundred sixty-five million, five hundred forty-three thousand, three hundred sixty-one".