55578223 has 2 divisors, whose sum is σ = 55578224. Its totient is φ = 55578222.

The previous prime is 55578217. The next prime is 55578227. The reversal of 55578223 is 32287555.

55578223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55578223 - 2²⁵ = 22023791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55578227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27789111 + 27789112.

It is an arithmetic number, because the mean of its divisors is an integer number (27789112).

Almost surely, 2^55578223 is an apocalyptic number.

55578223 is a deficient number, since it is larger than the sum of its proper divisors (1).

55578223 is an equidigital number, since it uses as much as digits as its factorization.

55578223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 37.

The square root of 55578223 is about 7455.0803483262. The cubic root of 55578223 is about 381.6233026210.

The spelling of 55578223 in words is "fifty-five million, five hundred seventy-eight thousand, two hundred twenty-three".