5185381819 has 2 divisors, whose sum is σ = 5185381820. Its totient is φ = 5185381818.

The previous prime is 5185381783. The next prime is 5185381841. The reversal of 5185381819 is 9181835815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5185381819 - 2⁹ = 5185381307 is a prime.

It is a super-2 number, since 2×5185381819² = 53776369217631497522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5185381849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2592690909 + 2592690910.

It is an arithmetic number, because the mean of its divisors is an integer number (2592690910).

Almost surely, 2^5185381819 is an apocalyptic number.

5185381819 is a deficient number, since it is larger than the sum of its proper divisors (1).

5185381819 is an equidigital number, since it uses as much as digits as its factorization.

5185381819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 49.

The square root of 5185381819 is about 72009.5953259008. The cubic root of 5185381819 is about 1730.8532460055.

The spelling of 5185381819 in words is "five billion, one hundred eighty-five million, three hundred eighty-one thousand, eight hundred nineteen".