5171394881 has 2 divisors, whose sum is σ = 5171394882. Its totient is φ = 5171394880.

The previous prime is 5171394857. The next prime is 5171394961. The reversal of 5171394881 is 1884931715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4717491856 + 453903025 = 68684^2 + 21305^2 .

It is a cyclic number.

It is not a de Polignac number, because 5171394881 - 2¹⁸ = 5171132737 is a prime.

It is a super-2 number, since 2×5171394881² = 53486650030466008322, 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 (5171394841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2585697440 + 2585697441.

It is an arithmetic number, because the mean of its divisors is an integer number (2585697441).

Almost surely, 2^5171394881 is an apocalyptic number.

It is an amenable number.

5171394881 is a deficient number, since it is larger than the sum of its proper divisors (1).

5171394881 is an equidigital number, since it uses as much as digits as its factorization.

5171394881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 47.

The square root of 5171394881 is about 71912.4111749843. The cubic root of 5171394881 is about 1729.2955891275.

The spelling of 5171394881 in words is "five billion, one hundred seventy-one million, three hundred ninety-four thousand, eight hundred eighty-one".