2289863281 has 2 divisors, whose sum is σ = 2289863282. Its totient is φ = 2289863280.

The previous prime is 2289863273. The next prime is 2289863293. The reversal of 2289863281 is 1823689822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2247613281 + 42250000 = 47409^2 + 6500^2 .

It is a cyclic number.

It is not a de Polignac number, because 2289863281 - 2³ = 2289863273 is a prime.

It is a super-2 number, since 2×2289863281² = 10486947691344169922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2289861281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144931640 + 1144931641.

It is an arithmetic number, because the mean of its divisors is an integer number (1144931641).

Almost surely, 2^2289863281 is an apocalyptic number.

It is an amenable number.

2289863281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2289863281 is an equidigital number, since it uses as much as digits as its factorization.

2289863281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 49.

The square root of 2289863281 is about 47852.5159317668. The cubic root of 2289863281 is about 1318.0640585194.

The spelling of 2289863281 in words is "two billion, two hundred eighty-nine million, eight hundred sixty-three thousand, two hundred eighty-one".