5178243281 has 2 divisors, whose sum is σ = 5178243282. Its totient is φ = 5178243280.

The previous prime is 5178243251. The next prime is 5178243289. The reversal of 5178243281 is 1823428715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5178241600 + 1681 = 71960^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 5178243281 - 2²⁶ = 5111134417 is a prime.

It is a super-2 number, since 2×5178243281² = 53628406954443289922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5178243289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2589121640 + 2589121641.

It is an arithmetic number, because the mean of its divisors is an integer number (2589121641).

Almost surely, 2^5178243281 is an apocalyptic number.

It is an amenable number.

5178243281 is a deficient number, since it is larger than the sum of its proper divisors (1).

5178243281 is an equidigital number, since it uses as much as digits as its factorization.

5178243281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 41.

The square root of 5178243281 is about 71960.0116800991. The cubic root of 5178243281 is about 1730.0586124016.

The spelling of 5178243281 in words is "five billion, one hundred seventy-eight million, two hundred forty-three thousand, two hundred eighty-one".