181047313 has 2 divisors, whose sum is σ = 181047314. Its totient is φ = 181047312.

The previous prime is 181047211. The next prime is 181047343. The reversal of 181047313 is 313740181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146095569 + 34951744 = 12087^2 + 5912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181047313 is a prime.

It is not a weakly prime, because it can be changed into another prime (181047343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90523656 + 90523657.

It is an arithmetic number, because the mean of its divisors is an integer number (90523657).

Almost surely, 2^181047313 is an apocalyptic number.

It is an amenable number.

181047313 is a deficient number, since it is larger than the sum of its proper divisors (1).

181047313 is an equidigital number, since it uses as much as digits as its factorization.

181047313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 181047313 is about 13455.3823059770. The cubic root of 181047313 is about 565.7145661733.

Adding to 181047313 its reverse (313740181), we get a palindrome (494787494).

The spelling of 181047313 in words is "one hundred eighty-one million, forty-seven thousand, three hundred thirteen".