265198163 has 2 divisors, whose sum is σ = 265198164. Its totient is φ = 265198162.

The previous prime is 265198139. The next prime is 265198177. The reversal of 265198163 is 361891562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265198163 - 2⁶ = 265198099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265198163.

It is not a weakly prime, because it can be changed into another prime (265191163) 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, 132599081 + 132599082.

It is an arithmetic number, because the mean of its divisors is an integer number (132599082).

Almost surely, 2^265198163 is an apocalyptic number.

265198163 is a deficient number, since it is larger than the sum of its proper divisors (1).

265198163 is an equidigital number, since it uses as much as digits as its factorization.

265198163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 265198163 is about 16284.9059868333. The cubic root of 265198163 is about 642.4758936587.

The spelling of 265198163 in words is "two hundred sixty-five million, one hundred ninety-eight thousand, one hundred sixty-three".