2163357281 has 2 divisors, whose sum is σ = 2163357282. Its totient is φ = 2163357280.

The previous prime is 2163357277. The next prime is 2163357311. The reversal of 2163357281 is 1827533612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1350195025 + 813162256 = 36745^2 + 28516^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163357281 - 2² = 2163357277 is a prime.

It is a super-2 number, since 2×2163357281² = 9360229450511425922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2163357211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081678640 + 1081678641.

It is an arithmetic number, because the mean of its divisors is an integer number (1081678641).

Almost surely, 2^2163357281 is an apocalyptic number.

It is an amenable number.

2163357281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163357281 is an equidigital number, since it uses as much as digits as its factorization.

2163357281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 2163357281 is about 46511.9047234146. The cubic root of 2163357281 is about 1293.3301935054.

The spelling of 2163357281 in words is "two billion, one hundred sixty-three million, three hundred fifty-seven thousand, two hundred eighty-one".