28223201 has 2 divisors, whose sum is σ = 28223202. Its totient is φ = 28223200.

The previous prime is 28223197. The next prime is 28223249. The reversal of 28223201 is 10232282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21715600 + 6507601 = 4660^2 + 2551^2 .

It is a cyclic number.

It is not a de Polignac number, because 28223201 - 2² = 28223197 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28223801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14111600 + 14111601.

It is an arithmetic number, because the mean of its divisors is an integer number (14111601).

Almost surely, 2^28223201 is an apocalyptic number.

It is an amenable number.

28223201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28223201 is an equidigital number, since it uses as much as digits as its factorization.

28223201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 28223201 is about 5312.5512703408. The cubic root of 28223201 is about 304.4636313419.

Adding to 28223201 its reverse (10232282), we get a palindrome (38455483).

The spelling of 28223201 in words is "twenty-eight million, two hundred twenty-three thousand, two hundred one".