6856542223 has 2 divisors, whose sum is σ = 6856542224. Its totient is φ = 6856542222.

The previous prime is 6856542193. The next prime is 6856542247. The reversal of 6856542223 is 3222456586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6856542223 - 2¹³ = 6856534031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6856542223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6856542263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3428271111 + 3428271112.

It is an arithmetic number, because the mean of its divisors is an integer number (3428271112).

Almost surely, 2^6856542223 is an apocalyptic number.

6856542223 is a deficient number, since it is larger than the sum of its proper divisors (1).

6856542223 is an equidigital number, since it uses as much as digits as its factorization.

6856542223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 43.

The square root of 6856542223 is about 82804.2403684739. The cubic root of 6856542223 is about 1899.7730313368.

It can be divided in two parts, 685654222 and 3, that added together give a square (685654225 = 26185²).

The spelling of 6856542223 in words is "six billion, eight hundred fifty-six million, five hundred forty-two thousand, two hundred twenty-three".