6620231 has 2 divisors, whose sum is σ = 6620232. Its totient is φ = 6620230.

The previous prime is 6620209. The next prime is 6620261. The reversal of 6620231 is 1320266.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6620231 is a prime.

It is a super-2 number, since 2×6620231² = 87654916986722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6620261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310115 + 3310116.

It is an arithmetic number, because the mean of its divisors is an integer number (3310116).

Almost surely, 2^6620231 is an apocalyptic number.

6620231 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620231 is an equidigital number, since it uses as much as digits as its factorization.

6620231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 6620231 is about 2572.9809560119. The cubic root of 6620231 is about 187.7692109139.

Adding to 6620231 its reverse (1320266), we get a palindrome (7940497).

The spelling of 6620231 in words is "six million, six hundred twenty thousand, two hundred thirty-one".