50703781 has 2 divisors, whose sum is σ = 50703782. Its totient is φ = 50703780.

The previous prime is 50703721. The next prime is 50703797. The reversal of 50703781 is 18730705.

50703781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 24591681 = 5110^2 + 4959^2 .

It is a cyclic number.

It is not a de Polignac number, because 50703781 - 2¹¹ = 50701733 is a prime.

It is a super-2 number, since 2×50703781² = 5141746815391922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50703721) 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 as a sum of consecutive naturals, namely, 25351890 + 25351891.

It is an arithmetic number, because the mean of its divisors is an integer number (25351891).

Almost surely, 2^50703781 is an apocalyptic number.

50703781 is the 4504-th centered pentagonal number.

It is an amenable number.

50703781 is a deficient number, since it is larger than the sum of its proper divisors (1).

50703781 is an equidigital number, since it uses as much as digits as its factorization.

50703781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 50703781 is about 7120.6587476160. The cubic root of 50703781 is about 370.1236037002.

The spelling of 50703781 in words is "fifty million, seven hundred three thousand, seven hundred eighty-one".