115223561 has 2 divisors, whose sum is σ = 115223562. Its totient is φ = 115223560.

The previous prime is 115223551. The next prime is 115223567. The reversal of 115223561 is 165322511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94575625 + 20647936 = 9725^2 + 4544^2 .

It is a cyclic number.

It is not a de Polignac number, because 115223561 - 2¹⁰ = 115222537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115223561.

It is not a weakly prime, because it can be changed into another prime (115223567) 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, 57611780 + 57611781.

It is an arithmetic number, because the mean of its divisors is an integer number (57611781).

Almost surely, 2^115223561 is an apocalyptic number.

It is an amenable number.

115223561 is a deficient number, since it is larger than the sum of its proper divisors (1).

115223561 is an equidigital number, since it uses as much as digits as its factorization.

115223561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 115223561 is about 10734.2238191683. The cubic root of 115223561 is about 486.6093293201.

The spelling of 115223561 in words is "one hundred fifteen million, two hundred twenty-three thousand, five hundred sixty-one".