8503494221 has 2 divisors, whose sum is σ = 8503494222. Its totient is φ = 8503494220.

The previous prime is 8503494199. The next prime is 8503494227. The reversal of 8503494221 is 1224943058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8495308900 + 8185321 = 92170^2 + 2861^2 .

It is a cyclic number.

It is not a de Polignac number, because 8503494221 - 2²⁶ = 8436385357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8503494227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4251747110 + 4251747111.

It is an arithmetic number, because the mean of its divisors is an integer number (4251747111).

Almost surely, 2^8503494221 is an apocalyptic number.

It is an amenable number.

8503494221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8503494221 is an equidigital number, since it uses as much as digits as its factorization.

8503494221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 8503494221 is about 92214.3926998383. The cubic root of 8503494221 is about 2041.1071637252.

The spelling of 8503494221 in words is "eight billion, five hundred three million, four hundred ninety-four thousand, two hundred twenty-one".