815103193 has 2 divisors, whose sum is σ = 815103194. Its totient is φ = 815103192.

The previous prime is 815103161. The next prime is 815103197. The reversal of 815103193 is 391301518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 763306384 + 51796809 = 27628^2 + 7197^2 .

It is a cyclic number.

It is not a de Polignac number, because 815103193 - 2⁵ = 815103161 is a prime.

It is not a weakly prime, because it can be changed into another prime (815103197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407551596 + 407551597.

It is an arithmetic number, because the mean of its divisors is an integer number (407551597).

Almost surely, 2^815103193 is an apocalyptic number.

It is an amenable number.

815103193 is a deficient number, since it is larger than the sum of its proper divisors (1).

815103193 is an equidigital number, since it uses as much as digits as its factorization.

815103193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 815103193 is about 28550.0121365999. The cubic root of 815103193 is about 934.1232854514.

The spelling of 815103193 in words is "eight hundred fifteen million, one hundred three thousand, one hundred ninety-three".