1065565181 has 2 divisors, whose sum is σ = 1065565182. Its totient is φ = 1065565180.

The previous prime is 1065565157. The next prime is 1065565199. The reversal of 1065565181 is 1815655601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1045940281 + 19624900 = 32341^2 + 4430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1065565181 is a prime.

It is a super-2 number, since 2×1065565181² = 2270858309919125522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1065565121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532782590 + 532782591.

It is an arithmetic number, because the mean of its divisors is an integer number (532782591).

Almost surely, 2^1065565181 is an apocalyptic number.

It is an amenable number.

1065565181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065565181 is an equidigital number, since it uses as much as digits as its factorization.

1065565181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 1065565181 is about 32642.9958949849. The cubic root of 1065565181 is about 1021.3940892052.

The spelling of 1065565181 in words is "one billion, sixty-five million, five hundred sixty-five thousand, one hundred eighty-one".