8514864221 has 2 divisors, whose sum is σ = 8514864222. Its totient is φ = 8514864220.

The previous prime is 8514864199. The next prime is 8514864223. The reversal of 8514864221 is 1224684158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8498258596 + 16605625 = 92186^2 + 4075^2 .

It is a cyclic number.

It is not a de Polignac number, because 8514864221 - 2¹⁰ = 8514863197 is a prime.

Together with 8514864223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8514864223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4257432110 + 4257432111.

It is an arithmetic number, because the mean of its divisors is an integer number (4257432111).

Almost surely, 2^8514864221 is an apocalyptic number.

It is an amenable number.

8514864221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8514864221 is an equidigital number, since it uses as much as digits as its factorization.

8514864221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 41.

The square root of 8514864221 is about 92276.0219179392. The cubic root of 8514864221 is about 2042.0164782576.

The spelling of 8514864221 in words is "eight billion, five hundred fourteen million, eight hundred sixty-four thousand, two hundred twenty-one".