13150315781 has 2 divisors, whose sum is σ = 13150315782. Its totient is φ = 13150315780.

The previous prime is 13150315753. The next prime is 13150315793. The reversal of 13150315781 is 18751305131.

13150315781 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., 12948391681 + 201924100 = 113791^2 + 14210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13150315781 is a prime.

It is a super-2 number, since 2×13150315781² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13150311781) 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, 6575157890 + 6575157891.

It is an arithmetic number, because the mean of its divisors is an integer number (6575157891).

Almost surely, 2^13150315781 is an apocalyptic number.

It is an amenable number.

13150315781 is a deficient number, since it is larger than the sum of its proper divisors (1).

13150315781 is an equidigital number, since it uses as much as digits as its factorization.

13150315781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 13150315781 in words is "thirteen billion, one hundred fifty million, three hundred fifteen thousand, seven hundred eighty-one".