8215820903 has 2 divisors, whose sum is σ = 8215820904. Its totient is φ = 8215820902.

The previous prime is 8215820857. The next prime is 8215820909. The reversal of 8215820903 is 3090285128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8215820903 - 2⁶ = 8215820839 is a prime.

It is a super-2 number, since 2×8215820903² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8215820909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4107910451 + 4107910452.

It is an arithmetic number, because the mean of its divisors is an integer number (4107910452).

Almost surely, 2^8215820903 is an apocalyptic number.

8215820903 is a deficient number, since it is larger than the sum of its proper divisors (1).

8215820903 is an equidigital number, since it uses as much as digits as its factorization.

8215820903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 8215820903 is about 90641.1656092308. The cubic root of 8215820903 is about 2017.8257249943.

The spelling of 8215820903 in words is "eight billion, two hundred fifteen million, eight hundred twenty thousand, nine hundred three".