115205771 has 2 divisors, whose sum is σ = 115205772. Its totient is φ = 115205770.

The previous prime is 115205749. The next prime is 115205773. The reversal of 115205771 is 177502511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115205771 - 2¹⁴ = 115189387 is a prime.

Together with 115205773, 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 (115205773) 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, 57602885 + 57602886.

It is an arithmetic number, because the mean of its divisors is an integer number (57602886).

Almost surely, 2^115205771 is an apocalyptic number.

115205771 is a deficient number, since it is larger than the sum of its proper divisors (1).

115205771 is an equidigital number, since it uses as much as digits as its factorization.

115205771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2450, while the sum is 29.

The square root of 115205771 is about 10733.3951292217. The cubic root of 115205771 is about 486.5842845999.

The spelling of 115205771 in words is "one hundred fifteen million, two hundred five thousand, seven hundred seventy-one".