181007201 has 2 divisors, whose sum is σ = 181007202. Its totient is φ = 181007200.

The previous prime is 181007161. The next prime is 181007207. The reversal of 181007201 is 102700181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177528976 + 3478225 = 13324^2 + 1865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181007201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (181007207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90503600 + 90503601.

It is an arithmetic number, because the mean of its divisors is an integer number (90503601).

Almost surely, 2^181007201 is an apocalyptic number.

It is an amenable number.

181007201 is a deficient number, since it is larger than the sum of its proper divisors (1).

181007201 is an equidigital number, since it uses as much as digits as its factorization.

181007201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 181007201 is about 13453.8916674693. The cubic root of 181007201 is about 565.6727840587.

Adding to 181007201 its reverse (102700181), we get a palindrome (283707382).

The spelling of 181007201 in words is "one hundred eighty-one million, seven thousand, two hundred one".