203221097 has 2 divisors, whose sum is σ = 203221098. Its totient is φ = 203221096.

The previous prime is 203221079. The next prime is 203221153. The reversal of 203221097 is 790122302.

Together with previous prime (203221079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201327721 + 1893376 = 14189^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 203221097 - 2⁶ = 203221033 is a prime.

It is equal to p_11247407 and since 203221097 and 11247407 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (203221037) 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 as a sum of consecutive naturals, namely, 101610548 + 101610549.

It is an arithmetic number, because the mean of its divisors is an integer number (101610549).

Almost surely, 2^203221097 is an apocalyptic number.

It is an amenable number.

203221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

203221097 is an equidigital number, since it uses as much as digits as its factorization.

203221097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 203221097 is about 14255.5637208775. The cubic root of 203221097 is about 587.9263572988.

Adding to 203221097 its reverse (790122302), we get a palindrome (993343399).

The spelling of 203221097 in words is "two hundred three million, two hundred twenty-one thousand, ninety-seven".