10815391 has 2 divisors, whose sum is σ = 10815392. Its totient is φ = 10815390.

The previous prime is 10815377. The next prime is 10815397. The reversal of 10815391 is 19351801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10815391 - 2⁷ = 10815263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10815397) 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, 5407695 + 5407696.

It is an arithmetic number, because the mean of its divisors is an integer number (5407696).

Almost surely, 2^10815391 is an apocalyptic number.

10815391 is a deficient number, since it is larger than the sum of its proper divisors (1).

10815391 is an equidigital number, since it uses as much as digits as its factorization.

10815391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 10815391 is about 3288.6761774307. The cubic root of 10815391 is about 221.1468417988.

The spelling of 10815391 in words is "ten million, eight hundred fifteen thousand, three hundred ninety-one".