5031781 has 2 divisors, whose sum is σ = 5031782. Its totient is φ = 5031780.

The previous prime is 5031769. The next prime is 5031791. The reversal of 5031781 is 1871305.

5031781 is digitally balanced in base 3, 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., 4879681 + 152100 = 2209^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 5031781 - 2⁵ = 5031749 is a prime.

It is a super-2 number, since 2×5031781² = 50637640063922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5031701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515890 + 2515891.

It is an arithmetic number, because the mean of its divisors is an integer number (2515891).

Almost surely, 2^5031781 is an apocalyptic number.

It is an amenable number.

5031781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5031781 is an equidigital number, since it uses as much as digits as its factorization.

5031781 is an evil number, because the sum of its binary digits is even.

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

The square root of 5031781 is about 2243.1631683852. The cubic root of 5031781 is about 171.3591280571.

The spelling of 5031781 in words is "five million, thirty-one thousand, seven hundred eighty-one".