28055201 has 2 divisors, whose sum is σ = 28055202. Its totient is φ = 28055200.

The previous prime is 28055143. The next prime is 28055231. The reversal of 28055201 is 10255082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14622976 + 13432225 = 3824^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 28055201 - 2¹⁸ = 27793057 is a prime.

It is not a weakly prime, because it can be changed into another prime (28055231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14027600 + 14027601.

It is an arithmetic number, because the mean of its divisors is an integer number (14027601).

Almost surely, 2^28055201 is an apocalyptic number.

It is an amenable number.

28055201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28055201 is an equidigital number, since it uses as much as digits as its factorization.

28055201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 28055201 is about 5296.7160580873. The cubic root of 28055201 is about 303.8583170855.

The spelling of 28055201 in words is "twenty-eight million, fifty-five thousand, two hundred one".