80838221 has 2 divisors, whose sum is σ = 80838222. Its totient is φ = 80838220.

The previous prime is 80838209. The next prime is 80838223. The reversal of 80838221 is 12283808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80802121 + 36100 = 8989^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 80838221 - 2⁶ = 80838157 is a prime.

Together with 80838223, 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 (80838223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40419110 + 40419111.

It is an arithmetic number, because the mean of its divisors is an integer number (40419111).

Almost surely, 2^80838221 is an apocalyptic number.

It is an amenable number.

80838221 is a deficient number, since it is larger than the sum of its proper divisors (1).

80838221 is an equidigital number, since it uses as much as digits as its factorization.

80838221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 80838221 is about 8991.0077855600. The cubic root of 80838221 is about 432.3866226921.

The spelling of 80838221 in words is "eighty million, eight hundred thirty-eight thousand, two hundred twenty-one".