815501341 has 2 divisors, whose sum is σ = 815501342. Its totient is φ = 815501340.

The previous prime is 815501329. The next prime is 815501377. The reversal of 815501341 is 143105518.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555969241 + 259532100 = 23579^2 + 16110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815501341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815508341) 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, 407750670 + 407750671.

It is an arithmetic number, because the mean of its divisors is an integer number (407750671).

Almost surely, 2^815501341 is an apocalyptic number.

It is an amenable number.

815501341 is a deficient number, since it is larger than the sum of its proper divisors (1).

815501341 is an equidigital number, since it uses as much as digits as its factorization.

815501341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 815501341 is about 28556.9841019671. The cubic root of 815501341 is about 934.2753556764.

Adding to 815501341 its reverse (143105518), we get a palindrome (958606859).

The spelling of 815501341 in words is "eight hundred fifteen million, five hundred one thousand, three hundred forty-one".