15813241 has 2 divisors, whose sum is σ = 15813242. Its totient is φ = 15813240.

The previous prime is 15813169. The next prime is 15813257. The reversal of 15813241 is 14231851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11696400 + 4116841 = 3420^2 + 2029^2 .

It is an emirp because it is prime and its reverse (14231851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15813241 - 2¹¹ = 15811193 is a prime.

It is equal to p_1019806 and since 15813241 and 1019806 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (15813271) 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, 7906620 + 7906621.

It is an arithmetic number, because the mean of its divisors is an integer number (7906621).

Almost surely, 2^15813241 is an apocalyptic number.

It is an amenable number.

15813241 is a deficient number, since it is larger than the sum of its proper divisors (1).

15813241 is an equidigital number, since it uses as much as digits as its factorization.

15813241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 15813241 is about 3976.5866015969. The cubic root of 15813241 is about 250.9999470908. Note that the first 4 decimals are identical.

The spelling of 15813241 in words is "fifteen million, eight hundred thirteen thousand, two hundred forty-one".