2571128069 has 2 divisors, whose sum is σ = 2571128070. Its totient is φ = 2571128068.

The previous prime is 2571128047. The next prime is 2571128083. The reversal of 2571128069 is 9608211752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2570997025 + 131044 = 50705^2 + 362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2571128069 is a prime.

It is a super-2 number, since 2×2571128069² = 13221399094399337522, 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 (2571122069) 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, 1285564034 + 1285564035.

It is an arithmetic number, because the mean of its divisors is an integer number (1285564035).

Almost surely, 2^2571128069 is an apocalyptic number.

It is an amenable number.

2571128069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2571128069 is an equidigital number, since it uses as much as digits as its factorization.

2571128069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 2571128069 is about 50706.2922032365. The cubic root of 2571128069 is about 1369.9600515817.

The spelling of 2571128069 in words is "two billion, five hundred seventy-one million, one hundred twenty-eight thousand, sixty-nine".