115388321 has 2 divisors, whose sum is σ = 115388322. Its totient is φ = 115388320.

The previous prime is 115388201. The next prime is 115388323. The reversal of 115388321 is 123883511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90935296 + 24453025 = 9536^2 + 4945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115388321 is a prime.

Together with 115388323, 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 (115388323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57694160 + 57694161.

It is an arithmetic number, because the mean of its divisors is an integer number (57694161).

Almost surely, 2^115388321 is an apocalyptic number.

It is an amenable number.

115388321 is a deficient number, since it is larger than the sum of its proper divisors (1).

115388321 is an equidigital number, since it uses as much as digits as its factorization.

115388321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 115388321 is about 10741.8955962158. The cubic root of 115388321 is about 486.8411556608.

The spelling of 115388321 in words is "one hundred fifteen million, three hundred eighty-eight thousand, three hundred twenty-one".