2071256261 has 2 divisors, whose sum is σ = 2071256262. Its totient is φ = 2071256260.

The previous prime is 2071256221. The next prime is 2071256273. The reversal of 2071256261 is 1626521702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1077808900 + 993447361 = 32830^2 + 31519^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071256261 - 2¹⁰ = 2071255237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2071256221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1035628130 + 1035628131.

It is an arithmetic number, because the mean of its divisors is an integer number (1035628131).

Almost surely, 2^2071256261 is an apocalyptic number.

It is an amenable number.

2071256261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2071256261 is an equidigital number, since it uses as much as digits as its factorization.

2071256261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2071256261 is about 45511.0564698294. The cubic root of 2071256261 is about 1274.7096631745.

Adding to 2071256261 its reverse (1626521702), we get a palindrome (3697777963).

The spelling of 2071256261 in words is "two billion, seventy-one million, two hundred fifty-six thousand, two hundred sixty-one".