115608221 has 2 divisors, whose sum is σ = 115608222. Its totient is φ = 115608220.

The previous prime is 115608191. The next prime is 115608253. The reversal of 115608221 is 122806511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113316025 + 2292196 = 10645^2 + 1514^2 .

It is a cyclic number.

It is not a de Polignac number, because 115608221 - 2¹⁰ = 115607197 is a prime.

It is a super-3 number, since 3×115608221³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115608821) 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, 57804110 + 57804111.

It is an arithmetic number, because the mean of its divisors is an integer number (57804111).

Almost surely, 2^115608221 is an apocalyptic number.

It is an amenable number.

115608221 is a deficient number, since it is larger than the sum of its proper divisors (1).

115608221 is an equidigital number, since it uses as much as digits as its factorization.

115608221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 115608221 is about 10752.1263478439. The cubic root of 115608221 is about 487.1502234358.

The spelling of 115608221 in words is "one hundred fifteen million, six hundred eight thousand, two hundred twenty-one".