6271667221 has 2 divisors, whose sum is σ = 6271667222. Its totient is φ = 6271667220.

The previous prime is 6271667201. The next prime is 6271667239. The reversal of 6271667221 is 1227661726.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6029522500 + 242144721 = 77650^2 + 15561^2 .

It is a cyclic number.

It is not a de Polignac number, because 6271667221 - 2⁵ = 6271667189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6271667201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3135833610 + 3135833611.

It is an arithmetic number, because the mean of its divisors is an integer number (3135833611).

Almost surely, 2^6271667221 is an apocalyptic number.

It is an amenable number.

6271667221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6271667221 is an equidigital number, since it uses as much as digits as its factorization.

6271667221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 6271667221 is about 79193.8584803140. The cubic root of 6271667221 is about 1844.1419002521.

The spelling of 6271667221 in words is "six billion, two hundred seventy-one million, six hundred sixty-seven thousand, two hundred twenty-one".