5103781 has 2 divisors, whose sum is σ = 5103782. Its totient is φ = 5103780.

The previous prime is 5103779. The next prime is 5103811. The reversal of 5103781 is 1873015.

5103781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3744225 + 1359556 = 1935^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 5103781 - 2¹ = 5103779 is a prime.

It is a super-2 number, since 2×5103781² = 52097160991922, which contains 22 as substring.

Together with 5103779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5103701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2551890 + 2551891.

It is an arithmetic number, because the mean of its divisors is an integer number (2551891).

Almost surely, 2^5103781 is an apocalyptic number.

It is an amenable number.

5103781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5103781 is an equidigital number, since it uses as much as digits as its factorization.

5103781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 5103781 is about 2259.1549304995. The cubic root of 5103781 is about 172.1725890659.

Adding to 5103781 its reverse (1873015), we get a palindrome (6976796).

The spelling of 5103781 in words is "five million, one hundred three thousand, seven hundred eighty-one".