165563303 has 2 divisors, whose sum is σ = 165563304. Its totient is φ = 165563302.

The previous prime is 165563297. The next prime is 165563327. The reversal of 165563303 is 303365561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165563303 - 2⁶ = 165563239 is a prime.

It is a super-2 number, since 2×165563303² = 54822414600539618, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165563303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165563003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82781651 + 82781652.

It is an arithmetic number, because the mean of its divisors is an integer number (82781652).

Almost surely, 2^165563303 is an apocalyptic number.

165563303 is a deficient number, since it is larger than the sum of its proper divisors (1).

165563303 is an equidigital number, since it uses as much as digits as its factorization.

165563303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 32.

The square root of 165563303 is about 12867.1404360099. The cubic root of 165563303 is about 549.1041095278.

The spelling of 165563303 in words is "one hundred sixty-five million, five hundred sixty-three thousand, three hundred three".