55155223 has 4 divisors (see below), whose sum is σ = 55910848. Its totient is φ = 54399600.

The previous prime is 55155179. The next prime is 55155227. The reversal of 55155223 is 32255155.

55155223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32255155 = 5 ⋅6451031.

It is not a de Polignac number, because 55155223 - 2²⁵ = 21600791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55155191 and 55155200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55155227) 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 in 3 ways as a sum of consecutive naturals, for example, 377703 + ... + 377848.

It is an arithmetic number, because the mean of its divisors is an integer number (13977712).

Almost surely, 2^55155223 is an apocalyptic number.

55155223 is a deficient number, since it is larger than the sum of its proper divisors (755625).

55155223 is an equidigital number, since it uses as much as digits as its factorization.

55155223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755624.

The product of its digits is 7500, while the sum is 28.

The square root of 55155223 is about 7426.6562462524. The cubic root of 55155223 is about 380.6526710649.

The spelling of 55155223 in words is "fifty-five million, one hundred fifty-five thousand, two hundred twenty-three".