201043217 has 2 divisors, whose sum is σ = 201043218. Its totient is φ = 201043216.

The previous prime is 201043177. The next prime is 201043243. The reversal of 201043217 is 712340102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179131456 + 21911761 = 13384^2 + 4681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201043217 is a prime.

It is not a weakly prime, because it can be changed into another prime (201048217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100521608 + 100521609.

It is an arithmetic number, because the mean of its divisors is an integer number (100521609).

Almost surely, 2^201043217 is an apocalyptic number.

It is an amenable number.

201043217 is a deficient number, since it is larger than the sum of its proper divisors (1).

201043217 is an equidigital number, since it uses as much as digits as its factorization.

201043217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 201043217 is about 14178.9709429140. The cubic root of 201043217 is about 585.8185798558.

Adding to 201043217 its reverse (712340102), we get a palindrome (913383319).

The spelling of 201043217 in words is "two hundred one million, forty-three thousand, two hundred seventeen".