115199321 has 2 divisors, whose sum is σ = 115199322. Its totient is φ = 115199320.

The previous prime is 115199311. The next prime is 115199323. The reversal of 115199321 is 123991511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100721296 + 14478025 = 10036^2 + 3805^2 .

It is a cyclic number.

It is not a de Polignac number, because 115199321 - 2⁶ = 115199257 is a prime.

It is a super-2 number, since 2×115199321² = 26541767117722082, which contains 22 as substring.

Together with 115199323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115199323) 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, 57599660 + 57599661.

It is an arithmetic number, because the mean of its divisors is an integer number (57599661).

Almost surely, 2^115199321 is an apocalyptic number.

It is an amenable number.

115199321 is a deficient number, since it is larger than the sum of its proper divisors (1).

115199321 is an equidigital number, since it uses as much as digits as its factorization.

115199321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 32.

The square root of 115199321 is about 10733.0946609074. The cubic root of 115199321 is about 486.5752036683.

The spelling of 115199321 in words is "one hundred fifteen million, one hundred ninety-nine thousand, three hundred twenty-one".