6189221 has 2 divisors, whose sum is σ = 6189222. Its totient is φ = 6189220.

The previous prime is 6189217. The next prime is 6189223. The reversal of 6189221 is 1229816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6180196 + 9025 = 2486^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 6189221 - 2² = 6189217 is a prime.

Together with 6189223, 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 (6189223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3094610 + 3094611.

It is an arithmetic number, because the mean of its divisors is an integer number (3094611).

Almost surely, 2^6189221 is an apocalyptic number.

It is an amenable number.

6189221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6189221 is an equidigital number, since it uses as much as digits as its factorization.

6189221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 6189221 is about 2487.8145027313. The cubic root of 6189221 is about 183.6025308847.

The spelling of 6189221 in words is "six million, one hundred eighty-nine thousand, two hundred twenty-one".