165545041 has 4 divisors (see below), whose sum is σ = 165593584. Its totient is φ = 165496500.

The previous prime is 165545011. The next prime is 165545059. The reversal of 165545041 is 140545561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 140545561 = 13 ⋅10811197.

It is a cyclic number.

It is not a de Polignac number, because 165545041 - 2⁷ = 165544913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165544994 and 165545012.

It is not an unprimeable number, because it can be changed into a prime (165545011) 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, 18735 + ... + 26116.

It is an arithmetic number, because the mean of its divisors is an integer number (41398396).

Almost surely, 2^165545041 is an apocalyptic number.

It is an amenable number.

165545041 is a deficient number, since it is larger than the sum of its proper divisors (48543).

165545041 is an equidigital number, since it uses as much as digits as its factorization.

165545041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48542.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 165545041 is about 12866.4307793576. The cubic root of 165545041 is about 549.0839196512.

The spelling of 165545041 in words is "one hundred sixty-five million, five hundred forty-five thousand, forty-one".