6551191 has 2 divisors, whose sum is σ = 6551192. Its totient is φ = 6551190.

The previous prime is 6551177. The next prime is 6551213. The reversal of 6551191 is 1911556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6551191 - 2⁷ = 6551063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6551141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275595 + 3275596.

It is an arithmetic number, because the mean of its divisors is an integer number (3275596).

Almost surely, 2^6551191 is an apocalyptic number.

6551191 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551191 is an equidigital number, since it uses as much as digits as its factorization.

6551191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 28.

The square root of 6551191 is about 2559.5294489417. The cubic root of 6551191 is about 187.1142028824.

The spelling of 6551191 in words is "six million, five hundred fifty-one thousand, one hundred ninety-one".