817937515223 has 2 divisors, whose sum is σ = 817937515224. Its totient is φ = 817937515222.

The previous prime is 817937515147. The next prime is 817937515229. The reversal of 817937515223 is 322515739718.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 817937515223 - 2¹⁴ = 817937498839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (817937515229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408968757611 + 408968757612.

It is an arithmetic number, because the mean of its divisors is an integer number (408968757612).

Almost surely, 2^817937515223 is an apocalyptic number.

817937515223 is a deficient number, since it is larger than the sum of its proper divisors (1).

817937515223 is an equidigital number, since it uses as much as digits as its factorization.

817937515223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3175200, while the sum is 53.

The spelling of 817937515223 in words is "eight hundred seventeen billion, nine hundred thirty-seven million, five hundred fifteen thousand, two hundred twenty-three".