28155802223 has 2 divisors, whose sum is σ = 28155802224. Its totient is φ = 28155802222.

The previous prime is 28155802211. The next prime is 28155802303. The reversal of 28155802223 is 32220855182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28155802223 - 2²⁶ = 28088693359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28155802723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14077901111 + 14077901112.

It is an arithmetic number, because the mean of its divisors is an integer number (14077901112).

Almost surely, 2^28155802223 is an apocalyptic number.

28155802223 is a deficient number, since it is larger than the sum of its proper divisors (1).

28155802223 is an equidigital number, since it uses as much as digits as its factorization.

28155802223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76800, while the sum is 38.

The spelling of 28155802223 in words is "twenty-eight billion, one hundred fifty-five million, eight hundred two thousand, two hundred twenty-three".