7855223 has 2 divisors, whose sum is σ = 7855224. Its totient is φ = 7855222.

The previous prime is 7855217. The next prime is 7855249. The reversal of 7855223 is 3225587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7855223 - 2⁸ = 7854967 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7855223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7855273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927611 + 3927612.

It is an arithmetic number, because the mean of its divisors is an integer number (3927612).

Almost surely, 2^7855223 is an apocalyptic number.

7855223 is a deficient number, since it is larger than the sum of its proper divisors (1).

7855223 is an equidigital number, since it uses as much as digits as its factorization.

7855223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 32.

The square root of 7855223 is about 2802.7170745546. The cubic root of 7855223 is about 198.7861730239.

The spelling of 7855223 in words is "seven million, eight hundred fifty-five thousand, two hundred twenty-three".