265552009 has 2 divisors, whose sum is σ = 265552010. Its totient is φ = 265552008.

The previous prime is 265551977. The next prime is 265552031. The reversal of 265552009 is 900255562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263737600 + 1814409 = 16240^2 + 1347^2 .

It is a cyclic number.

It is not a de Polignac number, because 265552009 - 2⁵ = 265551977 is a prime.

It is not a weakly prime, because it can be changed into another prime (265552069) 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, 132776004 + 132776005.

It is an arithmetic number, because the mean of its divisors is an integer number (132776005).

Almost surely, 2^265552009 is an apocalyptic number.

It is an amenable number.

265552009 is a deficient number, since it is larger than the sum of its proper divisors (1).

265552009 is an equidigital number, since it uses as much as digits as its factorization.

265552009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 265552009 is about 16295.7665974940. The cubic root of 265552009 is about 642.7615121405.

The spelling of 265552009 in words is "two hundred sixty-five million, five hundred fifty-two thousand, nine".