28171201 has 2 divisors, whose sum is σ = 28171202. Its totient is φ = 28171200.

The previous prime is 28171183. The next prime is 28171207. The reversal of 28171201 is 10217182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26532801 + 1638400 = 5151^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 28171201 - 2¹⁵ = 28138433 is a prime.

It is not a weakly prime, because it can be changed into another prime (28171207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14085600 + 14085601.

It is an arithmetic number, because the mean of its divisors is an integer number (14085601).

Almost surely, 2^28171201 is an apocalyptic number.

It is an amenable number.

28171201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28171201 is an equidigital number, since it uses as much as digits as its factorization.

28171201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 28171201 is about 5307.6549435697. The cubic root of 28171201 is about 304.2765294593.

Adding to 28171201 its reverse (10217182), we get a palindrome (38388383).

The spelling of 28171201 in words is "twenty-eight million, one hundred seventy-one thousand, two hundred one".