815098213 has 2 divisors, whose sum is σ = 815098214. Its totient is φ = 815098212.

The previous prime is 815098189. The next prime is 815098237. The reversal of 815098213 is 312890518.

It is a balanced prime because it is at equal distance from previous prime (815098189) and next prime (815098237).

It can be written as a sum of positive squares in only one way, i.e., 587480644 + 227617569 = 24238^2 + 15087^2 .

It is a cyclic number.

It is not a de Polignac number, because 815098213 - 2⁵ = 815098181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815098243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407549106 + 407549107.

It is an arithmetic number, because the mean of its divisors is an integer number (407549107).

Almost surely, 2^815098213 is an apocalyptic number.

It is an amenable number.

815098213 is a deficient number, since it is larger than the sum of its proper divisors (1).

815098213 is an equidigital number, since it uses as much as digits as its factorization.

815098213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 815098213 is about 28549.9249210922. The cubic root of 815098213 is about 934.1213830569.

The spelling of 815098213 in words is "eight hundred fifteen million, ninety-eight thousand, two hundred thirteen".