165044563 has 2 divisors, whose sum is σ = 165044564. Its totient is φ = 165044562.

The previous prime is 165044521. The next prime is 165044567. The reversal of 165044563 is 365440561.

165044563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (365440561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165044563 - 2¹³ = 165036371 is a prime.

It is equal to p_9241279 and since 165044563 and 9241279 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (165044567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82522281 + 82522282.

It is an arithmetic number, because the mean of its divisors is an integer number (82522282).

Almost surely, 2^165044563 is an apocalyptic number.

165044563 is a deficient number, since it is larger than the sum of its proper divisors (1).

165044563 is an equidigital number, since it uses as much as digits as its factorization.

165044563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 165044563 is about 12846.9670739829. The cubic root of 165044563 is about 548.5300284622.

The spelling of 165044563 in words is "one hundred sixty-five million, forty-four thousand, five hundred sixty-three".