5028511781 has 4 divisors (see below), whose sum is σ = 5247142752. Its totient is φ = 4809880812.

The previous prime is 5028511771. The next prime is 5028511799. The reversal of 5028511781 is 1871158205.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5028511781 - 2³⁰ = 3954769957 is a prime.

It is a super-2 number, since 2×5028511781² = 50571861463311583922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5028511771) 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 in 3 ways as a sum of consecutive naturals, for example, 109315451 + ... + 109315496.

It is an arithmetic number, because the mean of its divisors is an integer number (1311785688).

Almost surely, 2^5028511781 is an apocalyptic number.

It is an amenable number.

5028511781 is a deficient number, since it is larger than the sum of its proper divisors (218630971).

5028511781 is a wasteful number, since it uses less digits than its factorization.

5028511781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218630970.

The product of its (nonzero) digits is 22400, while the sum is 38.

The square root of 5028511781 is about 70912.0002608867. Note that the first 3 decimals coincide. The cubic root of 5028511781 is about 1713.2200853708.

Adding to 5028511781 its reverse (1871158205), we get a palindrome (6899669986).

The spelling of 5028511781 in words is "five billion, twenty-eight million, five hundred eleven thousand, seven hundred eighty-one".