2809268281 has 2 divisors, whose sum is σ = 2809268282. Its totient is φ = 2809268280.

The previous prime is 2809268261. The next prime is 2809268359. The reversal of 2809268281 is 1828629082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1939962025 + 869306256 = 44045^2 + 29484^2 .

It is a cyclic number.

It is not a de Polignac number, because 2809268281 - 2⁵ = 2809268249 is a prime.

It is a super-2 number, since 2×2809268281² = 15783976549265389922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2809268221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404634140 + 1404634141.

It is an arithmetic number, because the mean of its divisors is an integer number (1404634141).

Almost surely, 2^2809268281 is an apocalyptic number.

It is an amenable number.

2809268281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2809268281 is an equidigital number, since it uses as much as digits as its factorization.

2809268281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 2809268281 is about 53002.5308924017. The cubic root of 2809268281 is about 1411.0131847294.

The spelling of 2809268281 in words is "two billion, eight hundred nine million, two hundred sixty-eight thousand, two hundred eighty-one".