165225089 has 2 divisors, whose sum is σ = 165225090. Its totient is φ = 165225088.

The previous prime is 165225079. The next prime is 165225101. The reversal of 165225089 is 980522561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121440400 + 43784689 = 11020^2 + 6617^2 .

It is an emirp because it is prime and its reverse (980522561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165225089 - 2⁸ = 165224833 is a prime.

It is not a weakly prime, because it can be changed into another prime (165225079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82612544 + 82612545.

It is an arithmetic number, because the mean of its divisors is an integer number (82612545).

Almost surely, 2^165225089 is an apocalyptic number.

It is an amenable number.

165225089 is a deficient number, since it is larger than the sum of its proper divisors (1).

165225089 is an equidigital number, since it uses as much as digits as its factorization.

165225089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 165225089 is about 12853.9911700608. The cubic root of 165225089 is about 548.7299499215.

The spelling of 165225089 in words is "one hundred sixty-five million, two hundred twenty-five thousand, eighty-nine".